Creditors have much better memories than debtors. Deprive a mirror of its silver and even the Czar won't see his face. Do not clog intellect's sluices with bits of knowledge of questionable uses. Do not underestimate the power of the Force. Don't eat yellow snow.
All models are wrong.
Some are useful. The other line moves faster. Even a cabbage may look at a king. Even a hawk is an eagle among crows. Even the boldest zebra fears the hungry lion.