God marks the paths we are to travel, asking us to follow Him in faith. “Now faith is the assurance of things hoped for, the conviction of things not seen.” (Hebrews 11: 1) Noah believes God, that the flood is coming, that the ark can be built, that he and his family are able to gather representatives of every living thing, that the ark is able to save. Therefore, he acts righteously in this faith. And his faith is based in his trust of God — in the God he knows.
James writes, “Show me your faith apart from your works, and I will show you my faith by my works.” He firmly presents Abraham as a man who is “justified by his works,” writing: “You see that faith is active along with his works; and faith is completed by his works, and the Scripture is fulfilled that says, ‘Abraham believes God, and it is credited to him as righteousness.’ ” (James 2: 22, 23)