The only true wisdom is in knowing you know nothing.

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

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

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

Some cultures believe a long life brings wisdom. I'd like to think so. Perhaps, part of that wisdom is to recognize some of life's baffling paradoxes such as the way human beings have a huge propensity for good, and yet a capacity for evil.

Learning acquired in youth arrests the evil of old age; and if you understand that old age has wisdom for its food, you will so conduct yourself in youth that your old age will not lack for nourishment.