17 In the same way, faith by itself, if it is not accompanied by action, is dead. 18 But someone will say, "You have faith; I have deeds." Show me your faith without deeds, and I will show you my faith by my deeds. 19 You believe that there is one God. Good! Even the demons believe that—and shudder. 20 You foolish person, do you want evidence that faith without deeds is useless ?