The Tongue Must Be Heavy Indeed, Because

Real Knowledge Is To Know The Extent Of One's Ignorance.

Don't Use Cannon To Kill Musquito.

Be Strict With Yourself But Least Reproachful Of Others And Complaint Is Kept Afar.

Every Truth Has Four Corners: As A Teacher I Give You One Corner, And It Is For You To Find The Other Three.

Never Seek Illicit Wealth.