I should have been prepared for the question:Why would the ner tamid (the eternal light) have a switch? Or, more pithily: Does God have an ON/OFF switch? The midrash asks: Is it possible that Moses’ arms CAUSED Israel to win or lose in battle? God was there the entire time; the Israelites’ ability to win never flagged – but surrounded by a horrific battle, Israel too easily forgot about God’s presence. How’s the water today?” The fish smile and nod, and keep on swimming…until, at a distance, one little fish turns to the other little fish and says, “Nice guy – but tell me: What the heck is water?