CCC 146 Abraham thus fulfills the definition of faith in Hebrews 11:1: “Faith is the assurance of things hoped for, the conviction of things not seen”:1 “Abraham believed God, and it was reckoned to him as righteousness.”2 Because he was “strong in his faith”, Abraham became the “father of all who believe”.3
1 Heb 11:1.
2 Rom 4:3; cf. Gen 15:6.
3 Rom 4:11, 18; 4:20; cf. Gen 15:5.