Do not use a cannon to kill a mosquito.

That a man lives is because he is straight. That a man who dupes others survives is because he has been fortunate enough to be spared.

Learn, as if never overtaking your object, and yet as if apprehensive of losing it.

He who learns but does not think, is lost. He who thinks but does not learn is in great danger.

The book salesman should be honored because he brings to our attention, as a rule, the very books we need most and neglect most.

Be loyal and trustworthy. Do not befriend anyone who is lower than yourself in this regard.

The scholar does not consider gold and jade to be precious treasures, but loyalty and good faith.