James speaks as if "faith" and "works" were things that can work together and help each other. The meanings in the abstract nouns "faith" and "works" can be expressed with "believe God" and "do what God commanded." Alternate translation: "that because Abraham believed God, he did what God commanded him to do. And because Abraham did what God commanded, he believed God completely" (See: [[rc://en/ta/man/translate/figs-explicit]] and [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-abstractnouns]])