what is soul?

Soul is the unperishable,immortal entity within the human.One can ask where it resides? outside or inside a body?We are confused!!!!since we believe God or son of God resides inside the church or temple and our body is like a church or temple. Therefore we presume it to reside inside our body.Its nature is as sweet as the nature of super soul or father residing in the heaven.It just like a point source which transform its position from one body to another after death. Human physical body perish but not the soul. It changes its position as we change our dresses once it is torn.