CCC 146

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

Read the full chapter 3. Man’s Response to God ¶142–184