We are our soul. That is who we are, our identity.
What we are is flesh (man), that is our nature.
We/me (soul/s) is/are self aware because God breathed into our soul. Like turning on a torch, we became alive.
Baptism in the Holy Spirit is receiving the Spirit of God without measure, so that our spirit is connected to God Spirit. We become one with him. Our drop of water (spirit) is connected to the Ocean God's Spirit.

So the spirit of man, God can take back at death. But the Spirit of God that we recieve when we are born from above is not a once only thing, but the Spirit poured out without measure. It guarantees that we will not see death. The soul is who we are. Perhaps the area of our will, character and personality. The body is the vessel that contains the soul and lets us interact with the physical realm because the body we have is physical and of this world. It acts like a filter only letting us see and hear certain waves. Like a cocoon it is a form of protection locking us in the physical realm and hiding the greater realm from us.

The spirit that God gives us in the beginning is his breath which gives us awareness and life. But baptism in God's Spirit makes us one with him so that our spirit the spirit that he gave us will be one in unity with his Spirit and this makes us pure in spirit and one with God.

The spirit is the God conscience part of us and what gives us life. The soul is the self concious part of us. The body is the world conscious part of us.

It is our soul that God saves and his spirit he can take back at death. But God connects our spirit with his Spiritwhen we are born again. We are eventually given a spirtual body to make us complete.

Romans 8:16
The Spirit itself beareth witness with our spirit, that we are the children of God:

Psalm 35:9
And my soul shall be joyful in the LORD: it shall rejoice in his salvation.

Hebrews 4:12
For the word of God is quick, and powerful, and sharper than any twoedged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart.

2 Corinthians 5:1
Now we know that if the earthly tent we live in is destroyed, we have a building from God, an eternal house in heaven, not built by human hands.