“The Essence of Knowledge is, having it, to use it.”

“Knowledge is merely brilliance in organization of ideas and not wisdom. The truly wise person goes beyond knowledge.”

“Imagination is more important than knowledge.”

“Real knowledge is to know the extent of one's ignorance.”

“I used to take on trust a man's deeds after having listened to his words. Now having listened to a man's words I go on to observe his deeds.”

“When you know a thing, to hold that you know it; and when you do not know a thing, to allow that you do not know it--this is knowledge.”

“Things being investigated, knowledge became complete. Their knowledge being complete, their thoughts were sincere. Their thoughts being sincere, their hearts were then rectified. Their hearts being rectified, their persons were cultivated. Their persons being cultivated, their families were regulated. Their families being regulated, their States were rightly governed. Their States being rightly governed, the whole kingdom was made tranquil and happy.”