To know that you know, and to know that you don't know - that is the real wisdom.

By three methods we may learn wisdom: first, by reflection, which is noblest; second, by imitation, which is easiest; and third, by experience, which is the most bitter.

By three methods we may learn wisdom: first, by reflection which is noblest; second, by imitation, which is the easiest; and third, by experience, which is the bitterest.

He who knows all the answers has not been asked all the questions.

The man of wisdom is never of two minds;
the man of benevolence never worries;
the man of courage is never afraid.

Think no vice so small that you may commit it, and no virtue so small that you may over look it.