"I know not why not--as easy to ask why the sun is not the moon, although both illuminate the heavens. The sun is a star, a distant globe of hydrogen and helium, vast and ever-burning. The moon, a satellite of a satellite, a proximate globe of dust--a mirror to the sun, but not its equal. Though both church and chapel permit the contemplation of God, a church hath a priest and a congregation; a chapel hath not. What they need defines what they are, as the composition of the sun and moon define them."