We see here that there is an outward man and an inward man. The outward man is not the real you. Before we can understand how God will guide us through our spirits, we must first find out what a spirit is. When the bible speaks of the heart, it is speaking of the spirit, the inward man, or the hidden man. This is the real man.
People often misquote that scripture and put the body first instead of the spirit.
People are more body-conscious than spirit conscious. The more spirit conscious we become, then the leading of the Lord will be more real to us. We need to think of ourselves as spirit beings possessing souls and living in bodies. For the word of God is quick and powerful, and sharper than any two edged sword, piercing even to th dividing asunder of soul and spirit. Our understanding is part of our soul.