Study without reflection is a waste of time; reflection without study is dangerous

Philosophy is a study that lets us be unhappy more intelligently

If many years were added to my life, I would give fifty to the study of the Book of Changes and might thereby manage to avoid great mistakes.

Study the past, if you would divine the future.

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.

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.