The Delphic oracle said I was the wisest of all the Greeks. It is because I alone, of all the Greeks, know that I know nothing.

Socrates

Knowledge can be communicated, but wisdom cannot. A man can find it, he can live it, he can be filled and sustained by it, but he cannot utter or teach it.

Hermann Hesse

More wisdom is latent in things as they are than in all the words men use.

Antoine De Sant-Exupery

Wisdom is knowing what to do next; virtue is doing it.

David Starr Jordan

The wise person has long ears and a short tongue.

German proverb