A fool thinks himself to be wise, but a wise man knows himself to be a fool.

Experience is a hard teacher because she gives the test first, the lesson afterwards.

Anyone can deal with victory. Only the mighty can bear defeat.

In the spring, at the end of the day, you should smell like dirt.

We don't receive wisdom; we must discover it for ourselves after a journey that no one can take for us or spare us.

We can learn much from wise words, little from wisecracks, and less from wise guys.

There are years that ask questions and years that answer.

Knowing others is wisdom, knowing yourself is Enlightenment.

Life offers its wisdom generously. Everything teaches. Not everyone learns.

The aim of science is not to open the door to infinite wisdom, but to set a limit to infinite error.

Our purpose in life is to grow in wisdom and in love.

The feeling of right or wrong is the beginning of wisdom.

Besides the noble art of getting things done, there is the noble art of leaving things undone. The wisdom of life consists in the elimination of non-essentials.

Fear is the main source of superstition, and one of the main sources of cruelty. To conquer fear is the beginning of wisdom.

An owl is traditionally a symbol of wisdom, so we are neither doves nor hawks but owls, and we are vigilant when others are resting.