Know well what leads you forward and what holds you back, and choose the path that leads to wisdom.

The attempt to combine wisdom and power has only rarely been successful and then only for a short while.

We can know only that we know nothing. And that is the highest degree of human wisdom.

Mysterious language is not a sign of wisdom. The wiser a person is, the simpler the language he uses to express his thoughts.

Wisdom is a weapon to ward off destruction; It is an inner fortress which enemies cannot destroy.

The highest wisdom has but one science - the science of the whole - the science explaining the whole creation and man's place in it.