Let us discuss simple science.Energy cannot be created nor be destroyed.Science has proven that the sum of cosmic energy remains the same.So if we talk about packets of energy or just basic atomic level energy,we can be sure that energy has always exist and will never cease to exist.It cannot die.It will change it's form the way it wishes to or it can even be controlled.Continuing to talk about the simple science,it can futher be added that whatever we do,in the form of our actions and thoughts,carry some energy,positive or negative.Every action that manifests any kind of work carries and releases such energy into the atmosphere,thus contributing it's change of form by nor adding or subtracting enery from anywhere,by changing it's potential.When a person commits any evil,his/her mind works to catch corresponding energy from the atmosphere.It has to work for it.Thus a person who commits evil does so again and again because his/her mind works and catches such vibrations from the atomosphere.Similarly,a person who does good does so again and again because he catches similar energy to do his work.
Talking again about energy,there is crucial scientific evidence that there is a relationship between energy and matter.Newtonian physicists were interested only in mechancis and concerned primarily with understanding how one physical body moved in relation to,and was affected by ,another.Many question arose regarding the existence of energy which cannot be seen and more was argued about it's existence.Einstien seized this question and formulated one answer E=The square of m*c.This specified to the scientific world,the relation between them.It also states that they are inconvertable i.e matter can be changed into energy and energy can also be changed into matter.We also live energy,eat energy and be energy.We regulate our lives through energy.So this energy functions within us and it's control and realisation must hold facts true that open asnwers about our existence and reality.
So energy exists on many levels,as it's creation is almost infinite,existing on different levels.I just talked about our actions carrying energy create around us an similar atmosphere creating conditions of life.Beings who master this science to gather answers from beyond or the source of energy itself are called yogis.At the rate western science is advancing,it may take several centuries to reach where Yogic scientists have already penetrated and known all the answers.They insist,that the physical body is actually organized around a field of energy called the sukshma sharira(Sanskrit for "subtle body").
The level of functioning involving energy is called "prana"(life energy).According to ancient yogic texts called the Upnishads,the various level of existence form a continum-the physical worl,the pranic,the mental and the higher states of consciousness.These levels are layered,one upon the other.If minds want to affect the body,it alters the the flow of energy or prana.These yogis,who enter realms of superconscious,come face to face with,energy.That state is beyond matter,thought,experience and existence.That is why it is called the stateless state.
When a person dies,the energy leaves.The body is still there,but the prana departs.Breath is the vehicle of prana in the world,but when the prana departs from the body,how can we say that we die?The energy which neither material nor body departs.What happens now?This energy is pure consciousness.It is freedom. When it departs,the body does not remain with it,but the energy that is not neutralised,accompanies it.