Sacrifice of animals could not save whole world. God love his special creation that is man and women. God planned to sacrifice himself to save  his creation. God sent his only begoton son in the world in the form of Jesus. Jesus took the sin of all humnity and became sinner himself. Wages of sin is death. According to law of the land and of God,  sinner has to suffer physically and emotionally. God is spirit. Son of God is God. So Jesus is God. He became flesh and entered in the world in the form of Jesus. Hence, it is not possible spiritual sepatation from God. Because Jesus is God and God is spirit.