LUMINARY, n. One who throws light upon a subject; as an editor by not writing about it. - Ambrose Bierce
The bare knowledge of God's will is inefficacious, it doth not better the heart. Knowledge alone is like a winter sun, which hath no heat or influence; it doth not warm the affections, or purify the conscience. Judas was a great luminary, he knew God's will, but he was a traitor. - Thomas Watson