What is a common quote or saying that makes no sense? Please explain why you think so.

Share a common quote or saying that makes no sense. Please explain why you think so.
For example, "you're only as young as you feel."

The saying is, at best, ambiguous - at worst, dangerously misleading.

How one feels is not merely a matter of optimism or magical thinking;
it's far more likely to be an objective indicator of good health.

Research shows that people's chronological age is often very different to their real physical age.
A fit sixty-year-old can have the bone density, heart-rate and energy of a forty-year-old,
while an obese forty-year-old can have diabetes, high blood pressure and heart disease.