This question may pop out of minds in some point of life, this happens to some of the curious minds, this is a sign of higher development.
The answer to this question can be found out if you look deep inside you, you are the one who can think, you can feel the essence of you The Soul, people who meditate can feel the soul, it is the only real thing that make a person the other material stuffs we process which include our body are temporary thing that gives us a physical identity now scientists have proved that all the material stuffs around us is just an illusion projected to our soul.
The Physical body we possess is not actually you, it is just a false identity, we may get carried away by this false identity, the physical body you possess can be compared with the jeans you wear, the shirt you wear, the skirts you wear, can you say that the clothes you wear is actually you. Our bodies that we think as real you will perish.
All the regions tells us about the existence of our soul and teaches us how to save our soul but some of those fanatic religious teachings are not just a separatists idea which separates our souls. The truth is we ( our Soul ) is as vast as infinite universe, I will explain more about this through this website now we know who really are we, an infinite soul, which can transect space and time.
