4:20 he gave glory to God. Giving glory to God is a hallmark of faith, since it is dependence on God’s power and trust in His word of promise (v. 21). Abraham’s life of faith was one in which God’s attributes formed the foundation (1:20), and therefore in which God’s glory was displayed (cf. 1:21). It was through exercising this kind of faith that he was justified (v. 22).