He did not weaken in faith when he considered his own body, which was as good as dead (since he was about a hundred years old), or when he considered the barrenness of Sarah's womb.  No unbelief made him waver concerning the promise of God, but he grew strong in his faith as he gave glory to God,  fully convinced that God was able to do what he had promised. Therefore, since we have been justified by faith, we have peace with God through our Lord Jesus Christ.

 Through him we have also obtained access by faith into this grace in which we stand, and we rejoice in hope of the glory of God.  What shall we say then? Are we to continue in sin that grace may abound?  By no means! How can we who died to sin still live in it?  Do you not know that all of us who have been baptized into Christ Jesus were baptized into his death?  We were buried therefore with him by baptism into death, in order that, just as Christ was raised from the dead by the glory of the Father, we too might walk in newness of life.

26 Likewise the Spirit helps us in our weakness. For we do not know what to pray for as we ought, but the Spirit himself intercedes for us with groanings too deep for words. 27 And he who searches hearts knows what is the mind of the Spirit, because the Spirit intercedes for the saints according to the will of God. 28 And we know that for those who love God all things work together for good, for those who are called according to his purpose.