James 1:8

8. A doubleminded man Literally, a two-souled man. A piquant name for the waverer of James 1:6. To render the sarcasm with more point, some commentators, in view of the fact that is is wanting in the Greek, translate, A double-souled man, unstable in all his ways. The double-minded man is one who has two such opposite modes of thought and conduct alternately prevailing as to seem to be two different individuals at different times. He is “unlike himself.” So a young Persian explained to Cyrus his two opposite courses of conduct under different influences by saying, “I must have two souls.” The word two-souled was probably St. James’s invention, but it was so expressive as to be adopted by the early Christian writers. So the Apostolic Constitutions say, “Be not two-souled in thy prayer, as to whether it shall be fulfilled or not.” And Clement of Rome says, “Wretched are the double-souled, who divide their souls in two.”