“No unbelief or distrust made him (Abraham) waver (doubtingly question) concerning the promise of God, but he grew strong and was empowered by faith as he gave praise and glory to God, Fully satisfied and assured that God was able and mighty to keep His word and to do what He had promised.” Romans 4:20-21 IOW – Even though Abraham was impotent (he had a failing body at 100 years old) and his wife Sarah was barren, he was fully persuaded that God had the power to do what He promised (many nations from his offspring). He was even strengthened in his faith, gave glory to God, and praised Him! This hope, even though all earthly reasonable hope was lost, granted Abraham a credit of righteousness.