Thresholds

It’s incorrect to say that ‘salt is bad for you’.

A certain level of salt (sodium chloride) is critical for good health. Certainly too much is dangerous.

It’s incorrect to say that ‘being efficent’ will help your success. Too much efficiency (getting stuff done) can damage your effectiveness (getting the correct things done).

There is a threshold for everything: salt, sunlight, exercise…….being smart is reaching the threshold and no more.