By three methods we may learn wisdom: First, by reflection,... - 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 by Confucius
"The man of wisdom is never of two minds;the man of benevolence never worries;the man of courage is never afraid."
"Without feelings of respect, what is there to distinguish men from beasts?"
"It does not matter how slowly you go as long as you do not stop."
"The way out is through the door. Why is it that no one will use this method?"
"he who will not economize will have to agonize"