James 2:17-20

so also the faith, if it may not have works, is dead by itself. But say may some one, Thou hast faith, and I have works, shew me thy faith out of thy works, and I will shew thee out of my works my faith: thou — thou dost believe that God is one; thou dost well, and the demons believe, and they shudder! And dost thou wish to know, O vain man, that the faith apart from the works is dead?