You may say in your heart, “How shall we know the word which Yahweh has not spoken?” When a prophet speaks in Yahweh’s name, if the thing doesn’t follow, nor happen, that is the thing which Yahweh has not spoken. The prophet has spoken it presumptuously. You shall not be afraid of him.
If I have the gift of prophecy, and know all mysteries and all knowledge, and if I have all faith, so as to remove mountains, but don’t have love, I am nothing.