Life of the flesh: You are conceived and born into the world.
Life of the spirit: You are conceived and born in the Kingdom of Heaven.
Death of the flesh: Your flesh dies, your spirit goes to sleep, and your flesh is buried in the grave.
Death of the Spirit: Your soul dies in the lake of fire after the last judgement.
At the day of judgement, all human souls will be awakened by God. If your name is in the book of life, you will be given a new body and resurrected to a new fleshly life. If your name is not in the book of life, you will be thrown to the lake of fire (Rev. 20:11-15). The lake of fire signifies the end of your soul and complete extinction of your being.
That is why He says:
Fear not them which kill the body, but are not able to kill the soul: but rather fear him which is able to destroy both soul and body in hell (Mat 10:28).
FEAR GOD. Fear no man.