Five Bodies of a humans The Pancha Kosha

Humans has Five types of bodies or layers

1. Anamaya-Kosh - The body made out of Food. This physical body is nothing, but made out of food, we eat. That is why it is called                    Anamaya Kosh.
2. Pranamaya Kosh- The body which is related to Breath.
3. MannamayaKosh - The body made out of thoughts and emotions etc.
4. Vigyanmaya Kosh - The Body made up off subtle and Paranormal Science.
5. Anadhamaya Kosh -The last layer, or body which is made out of bliss and is your true nature. 

These Five layers are identified by Rishis. Which every human has.
These Five layers are the stepping stone of all yogi's mystical powers called as Siddhis.
These are the basic ladders through which  a mystic masters his Sadhana (i.e spiritual techniques ),
and experience different experiences through them.

when his Yog Sadhana matures. Then he can experience each of these layers one by one.
There is a difference between what the religious or spiritual Shastra (Text/ written laws) says, and what a Guru might say.
But both of these explanation are entangled with each other, and they are not experienced as different. A sadhak (student in the spiritual realm ) of dhyan yog (focus) , who studies studies yog, or experiments with the yog. Under the guidance of a competent master. Who focuses on kundalini, or any other system of dhyan. He must know Kosh i.e Layers and the technique to enter, or be aware of the layer.
Our connection to the Anamai i.e (body made out of or works on food) shows us that we are part of this universe, and even makes us feel that we cant live in isolation of it. When we are in this body our senses are focused towards the outer world. In this world there are various flavors sweet, sour , spicy etc. And these Flavors has the capacity to distract you or indulge you.
For example if we love a friend. Then that friendship will create attachment for you. And if you were lonely throughout your life.Then we have the enemies ready to trouble you, and their enmity will create goals for you. Which will bind you in this world, These enemies have worthless goals. They will leave everything important, and waste time on your destruction, or to cause troubles to you. They neither care for their times, or their lives.
They just want to talk of you, cause troubles for you. And get jealous on your joys, and even if you dont want your forced to respond or react.
Sometimes your will feel hungry, sometimes warm, sometimes cold, some times you will experience joy, and some times you will come across sorrow.
All these things are related to your food body, or Anamaya Kosh. And precisely for this reason we experience our connection with this world.
 We are citizen of some country. We are sons and daughters of our parents. friends of some people. In this manner we are connected to lot of people in various roles, and we live according to their feeling, emotions and expectations.
But our attachment with the Anamaya kosh, or the first layer is so strong. That to penetrate it is normally impossible, or very difficult. Then how would we enter deeper into Pranamaya , Mannomaya, Vigyanmaya layers etc.
That is why a sadhak, has a very difficult challenge. That how would he tackle the material world ?
We have two options.
The first one is to become Gyan Margi Yogi (i.e one who experience through knowledge ), and enter the deeper layers through this techniques. for this we have to get rid of all the enemies. All the worries. In the ancient times this technique was the most popular. That is why the yogis use to leave their palaces, houses or huts, and travel to inhabited places like mountains of Himalaya. And focus or practice this techniques. Nobody could reach these remote places nor an enemy or friend, but the situations are totally different then and now.
Today humans can reach anywhere. Even the Himalayas are no more untouched by humans in this situation. What can we do ?
There is another way. That is to live amongst people in our Towns and cities. And then enter, or travel into these deeper layers.
Now what is the important difference between  these two systems, or techniques ?
In the first technique you become slowly aware, or travel from your Anamaya Kosh to Pranmaya, then Manomaya, then Slowly to Vigyanmaya and in the end into your original form i.e Anadhmaya, This is a long process. It gives not just joy but indescribable bliss, or happiness. There is no language, or word to it. Which can do justice to it, and nor do a lay person has the capacity to understand it.
For example consider a heavenly, or divine pleasure. Which a human can never experience, only the god has access to it. A mere human can only imagine it, but can never know it. In the same manner a human, who is entangled in this material world, can try to speculate, and imagine, through thoughts; But he can never do it, as it is not his experience. This kind of pleasure, state, bliss or happiness is there.
The second path is to stay here in this entanglement of material world, and slowly slowly enter the deeper layers, until you attain Anadhmaya.
So what is important difference ?
 The difference is in the Himalayas. You dont have friends or enemies, you dont love anyone nor do you hate, only you and you alone is there.
But even there you have to act. Like you have to protect your body, you have to train  your body to adapt to the extreme climate , you have to arrange water and other necessities for yourself, even there you have to keep yourself organised and healthy.
In the same way in the material world. You will have to act here, neither will your friend leave you alone, nor will your enemies let you breathe freely. Besides your struggle for survival.
So what must you do in this case ?
Either you could choose to battle nature, but if you choose to be amidst, all these flavors of this material world. Then you will have to respond in kind to your enemies. You will have to be nonviolent or unattached from inside, but at the same time from outside you should look strong and violent.
Think of it if you are a snake, and you dont have poisonous fangs. Then no one will leave you alone. You cant survive in this world. That is why the rishis (monks) had powers, tapobal : the powers achieved through Taap (austerities). So that they could fight demons, and evils. Today these demons have changed their forms, but they are here in between us. Every moment staring at us. Watching our every step. How would your free yourself, from these demons ?
They will not allow you to choose either of the two ways.
That is why the first big challenge is with the Anamaya Kosh.
Till now we have only learnt about the challenges of the material world, and the two ways to enter inside from Anamaya to Anadhmaya Kosh.
Either go into the inhospitable isolation, and focus, or fight in this world, and enter your deeper layers.
This is not possible. That without a struggle, just by sitting still, without self defense,  without a fight to enter your deeper layers. This is impossible. Nature doesn't allow it.
There is always a fight between good and bad , satvic and tamas , punya (good deeds) and paap (bad deeds).
Punya is alone, limited it does its works alone and is stuck to what is right. But paap is wide spread, it has a lot of supporters and aides, etc. And all of them unite to attack you. Then how would you save yourself in this situation. You will be stuck in Anamaya Kosh.
Even if you are able to save yourself, from all this like the sadhus, saints and mahatmas. Who after wearing a robe. They think, they are free from all worries but they are not. And the second big challenge is their own delusion. Some one is in delusion of  their knowledge. Some are in delusion of  their powers and contacts. Some are in delusion of  the numbers of their disciples they have. Some are in delusion of  money or mystical powers.
And this delusion keeps us stuck to this Anamaya Kosh. All these causes entangle us into this outside world.
This is why, when we achieve powers through mantra, Ashtang Yog or any other sadna techniques. which we use to take our awareness or enter into the deeper layers. In this deeper layers we find divine powers, and we exhaust this divine powers in this material world. Because we are stuck with the Anamaya Kosh, and we dont want to let go the entanglement of this layer.
To get deeper into other layers either we have to reject this Anamaya Kosh, or accept it in its totality.
we only have these two options.
You can reject the Anamaya Kosh only in the last stages of life. When you have achieved Dharma (Righteousness ) , Arth (fulfillment ), Kam (Pleasures) and is only seeking for moksha.
But if your young or a child and you have tried to enter inside through dhyana. Then you have to choose the second option.
One has to understand this minutely.
To enter Pranamaya ,from Anamaya is very difficult process. The world will stop you, and you yourself will not let you do it.
And if some how you enter then you achieve some powers, and you will use that powers  in the outer world for material desires. In this situation there is no solution, and specially in Kalyug there are much more difficulties. That is why, if you become a yogi who lives in inhospitable forest that can only happen through divine grace. Otherwise you find a lot of forest dwelling yogis, who smoke weed (cannabis ). Their lives has no meaning they look sadhu, but there is no satva tatva i.e purity or the most divine element.
Now like how you only imagine the Anamaya Kosh. You can imagine or define Satvicktha, in your own shallow ways. That sadhu are humble , merciful ,they are able to do anything , powerful and have all the great qualities etc.
To enter deeper from Anamaya. That is the exact reason, why you either have to reject the body which is only possible in the last stage of life or accept it in it totality.
Now how can we accept the Anamaya Kosh ?
There are techniques for that too.
To accept the Anamaya, in its totality means to follow the teachings told to you by a competent guru, or through the techniques of yoga,  enter the process of entering your deeper Koshas, or layers, or bodies. And with that do all your work, or duties. That is if you are unmarried get married. If your a businessman run your business. In other words do what your suppose to do, or fulfill your responsibilities and duties, but at the same time be spiritual.
One can either leave this world and attain Anandhmaya, or like Raja  Janak, you maybe involved in this world and attain Anandhmaya. In both the ways the pleasure or bliss is the same.
One can be a viragi. While being involved, into the world, or leave the active involvement, and retire to deep forest. Nothing is better then the other both are noble.
Raja Janak was best of the kings. He served his parents, raised his child , loved his wife, to the best of his abilities. While doing all this he achieved the eternal bliss, of his Anandhmaya Kosh. Through his dhyana.
But for this with deep study, you should continuously be engaged, with the techniques, or tradition of those Parampara. When you have moved beyond the awarness of this body only then you can enter deep. And getting in these deeper layers, is even wining over your death.     
A yogi can appear, anywhere, any time. But it is not through his sheer strength, but by leaving his Anamaya Kosh. And through the strength of of his manomaya and will power.
To win over Anamaya we have to take help of Pranamaya, cause the closest layer to Anamaya is Pranamaya, and same Pran is attached to our breaths. Which we breath, in and out.
That is why, we ocus on breath and try to focus on breath alone for a long duration of time, this helps us to be free from Anamaya and slowly we enter Pranamaya and son on we enter Manomaya.
Our third layer is made up of thoughts, emotions etc so the second way is through sanklap (Resolution) or thoughts you can enter deeper layers.
For these one must think or focus on one thought until it becomes crystal clear and he is stable on that thought and then you let go even that last thought too, then you turn inward when you feel your different then Anamaya.
But there is a problem a normal sadhak or a beginner it is difficult for him to understand this, but before we dive deep let us clear some imagined definitions of yogi in public mind. 
To be a yogi one doesnt have to be unmarried or poor, It has nothing to do with yoour marriage or wealth or sickness or health, however you maybe the moment you start entering inside from Anamaya you become an yogi. Who ever you are a teacher , a doctor , a driver what so ever , It doesnt matter.
But for someone who has no knowledge of spirituality who wants to enter inside, how to start with the whole process ?
There are only tow ways through practice of parnayam and other is Dharna. To practice Dharna the easiest way to start is with you sleep cycle (process of sleeping and awakening  ).
how to Begin ?
At night when you feel sleepy try to think as if your dead or dying, The night sleep is the best time to practice it and this should be done daily.
while sleeping have this thought that you have no awareness, that you are no one and then see how you feel ?
In the beginning when you feel this your sleep will break, but then slowly you come to a state (in half sleep) when your thoughts and sleep go together and at this point of time in your sleep you will feel your dead. Then all those imaginations feels real which are possible after death. And when you are regularly connected to this thought and practice it then you enter deeper layer from Anamaya and you may enter  Pranmaya or Manomaya and back. That is why sometimes a person who is lost in dreams or is mostly sleepy , these people can have power of intutions of future etc, they see things which are supposed to happen in future in their dreams and slowly when the practice mature then they can see even beyond death.
All this should be done under competitent guru, as the process is easy but not simplest.
So the question is same where should we begin ?
In parnayam while doing it, the practice of not breathing or being without breath for long duration of time is an ancieta technique of getting into dhayan.
The process is breathe out then don't breathe in or just sit quite , when the duration increases then a thoughtless state is achieved then when you go to bed at night we think of death and dream of it then this dream become deep dhayan.
The dream which we think useless become deep dhayan through sadhana and one day we win over sleep , then we don't fall sleep but we can see future and that is why we understand kaal or time and in this state we breach Manomaya into Vigyanmaya.
In this state we understand the deep mystery of this universe but remember to fight the layers and get deeper inside is still easy but the first fight with the Anamaya kosh is very difficult.
Think of it when the Anamaya kosh the body which runs on food is healthy how good does it feels, but when it is invaded by virus and microbes this same body gives us pain in this world. There were people on this face of earth who were rotting while they were alive, they had magots in their body.
Think what and how will they feel at that time ?
The same body which we love feels like the biggest enemy we have on this earth.
That's is why to understand the plays of this Anamaya is very difficult and the goddess Yogmaya Maha Maya, whose maya runs the universe she has entangled us in this Anamaya, in this fashion that even if we want we can't get detached from it . Some times ego , love , respect then sometimes anger, lust and desire entangle us.
The question is there no way to get rid of it ?
To get rid of it one must go to a competent guru and walk on the path where there will be war and peace , anger and love that is all flavors of life, that is be a yogi inside yet look perfectly normal outside.
That is why these sadhana are secret sadhana of yog like kundalini sadhana.
So as to know panch kosh one has to have the list of each layer and have a deep information about each one of them.
So to travel through this layer is very awesome technique but before that one must know Anamaya and it's plays and then start your practice through dreams, then take it forward through paranayam then this travel will start at that instance.
And at that instance you become an yogi

Victory to Shri PriyaIshputra
Namo adesh