Confucius
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.
More quotes and aphorisms
Don't walk behind me...No one lies so boldly as the man who is indignant...A good objective of leadership is to help those...Never forget the three powerful resources...It will free man from the remaining chains...And know that I am with you always...