We are made of three parts. They are the mind, body and soul.
Your mind is found in every cell of your body. Your brain just processes the information from every cell of your body. Your brain is not your mind. And you mind is not you.
In addition what you mind knows, comes from everything you have been told or what you believe in. Your teachers, parents, religion and all the knowledge accumulated within your living memory in this life-time.
You soul knows more than what you know from this life time.
It knows everything about you and a great deal more about God than what you mind knows. Your soul is the only way you can feel or reach God. The soul is your essence and is more you than your mind or your body.
Your soul is not located inside your body, but surrounds your entire body. It is strongest around your body and tapers off gradually with distance from you body. Part of it is everywhere in the universe. Part it becomes a part of other souls. In the spiritual world we connected through our souls and in a sense we are all one and also one with the spiritual fabric of God.
Jesus and other masters have understood this. That is why Jesus said to love God you have love your neighbor. When you love your neighbor you are also loving yourself. That is why many find joy in loving others. Part of you is in everyone else.
Every time you sleep , the soul or the center of your soul leaves your body. The soul keeps the mind and body together. Without the soul the mind is lost and your body cannot function coherently. That is what happens during sleep. So it actually leaves your body once every 24 hrs, In death it permanently leaves your body. In essence your soul is you and is a spirit powered by only one eternal energy source, God.