Confucius

There are three methods to gaining wisdom. The first is reflection, which is the highest. The second is limitation, which is the easiest. The third is experience, which is the bitterest.

They must often change, who would be constant in happiness or wisdom.

Wisdom, compassion, and courage are the three universally recognized moral qualities of men.

When it is obvious that the goals cannot be reached, don’t adjust the goals, adjust the action steps.

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 bitterest.