Here, it is implied that "works" refers to things people do because they believe in God, such as obeying God's commands. James speaks as if "faith" and "works" were things that can work together and help each other. This can be restated to remove the abstract nouns "faith" and "works." Alternate translation: "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]])