In truth, says Maimonides (probably following the Mutazilites), we cannot know anything of God except that He exists. Even the nonphysical terms that we use of Him—intelligence, omnipotence, mercy, affection, unity, will—are homonyms; i.e., they have different meanings when applied to God than as used of man. Just what their meaning is in God’s case we shall never know; we can never define Him; we must not ascribe to Him any positive attributes, qualities, or predicates whatever.
