What Paul wrote about unbelieving Jews in his day could be said, I fear, of some believing Christians in ours: “I bear them witness that they have a zeal for God, but it is not enlightened.”1 Many have zeal without knowledge, enthusiasm without enlightenment. In more modern jargon, they are keen but clueless. Now I thank God for zeal. Heaven forbid that knowledge without zeal should replace zeal without knowledge! God’s purpose is both, zeal directed by knowledge, knowledge