So then, brethren, we are debtors, not to the flesh, to live according to the flesh— for if you live according to the flesh you will die, but if by the Spirit you put to death the deeds of the body you will live. For all who are led by the Spirit of God are sons of God. For you did not receive the spirit of slavery to fall back into fear, but you have received the spirit of sonship. When we cry, “Abba! Father!” it is the Spirit himself bearing witness with our spirit that we are children of God, and if children, then heirs, heirs of God and fellow heirs with Christ, provided we suffer with him in order that we may also be glorified with him.
–Romans 8:12-17