The world abounds in aphorisms that convey wisdom to the young, although that advice is usually ignored. Many aphorisms are by unknown authors: “A stitch in time saves nine” (although anyone who has repaired a sail knows that one stitch can actually save 9,000). “People who live in glass houses shouldn’t throw stones.” And many witty people have contributed their own, like this gem from Mae West: “Lead me not into temptation; I can find the way myself.”