I understand that this is quite a cliched question, but I really want to know the answer, and I'm a little too lazy to go and search the forum for my answer. Sorry for my lazyness.
At any rate, this is a question I always wanted an answer to. What exactly does a soul DO? Most of the things I can think of that are considered the purpose of a soul, are covered by the brain and heart. What exactly does an immortal soul do?
Great question, even though you may not yet find it worthy of some time to search out info. on. Lee Strobel's book, "A Case For A Creator" has a great section on the conscious being of man and the mind - chapter 10, "Evidence of Consciousness - the enigma of the Mind".
Scientists are asking the same thing as they know and see that the brain is not all that causes a conscious state of being in man. Conclusion: We are not just computers made of meat.
The soul is the mind and spirit/life that God breathed into the body of man, and science is begining to see this and shake its head, as it often does when looking at all that God has made in life.
The brain acts much like a mechanism to manifest the mind, much in the way a TV set gives us a picture and sound waves from the air. If injury causes some aspects of the brain to not function properly, it doesn't prove it as the source of the mind. It just proves that part of the apparatus is damaged.
Scientists still have no idea why the brain, in its part, causes consciousness.
There is more to us than conscious life and body. There is part of "self" or "I" that cannot be touched unless manifested by ones behavior or talk. We have free will to be "self" or a soul and are not just brains....
The ideas of sentience in robots is fantasy, as it just does not come by intelligence. The machine or mechanism does not make the whole, as surgeons and scientists that probe the brain can attest to..
Strobel speaks with many scientists and doctors in his book and stuides about how there is not part of the brain where one can stimulate thought.... Check out the book if really interested in seeking the truth about how little we really know of life and our existence.