Ki Tisa by Rabbi David Hartley Mark

Most of us know the story well: Moses follows God’s commands and ascends Mt. Sinai amid smoke and thunder, to receive the Ten Commandments, to be carved out of solid stone by God, using a fingertip of lightning. Moses appoints Aaron, his brother and the High Priest, to supervise the Israelites during his absence. But Aaron is a poor classroom monitor, as I like to say, and he gives the fearful, misbehaving Israelites free rein to do as they wish—and they disobey God’s express command, using a large amount of their Egyptian gold and silver to build a Golden Calf, despite being expressly forbidden to perform idol worship.