1. Just as eating against one’s will is injurious to health, so studying without a liking for it spoils the memory, and it retains nothing it takes in.
2. Just as iron rusts unless it is used, and water putrefies or, in cold, turns to ice, so our intellect spoils unless it is kept in use.
3. Those who are in love with practice without knowledge are like the sailor who gets into a ship without rudder or compass and who never can be certain whether he is going. Practice must always be founded on sound theory.
4. Anger is short-lived madness.
5. Whoever lives in fear will die of fear.
6. Patience serves us against insults precisely as clothes do against the cold. Increase your patience under great offences, and they cannot hurt your feelings.
7. Criticize the opinion and not its author.
8. He who thinks little, errs much.
9. Knowledge of the countries of the world is both an adornment and food of human minds.
10. Even the lion faces unhappy days when everything goes haywire and misadventures await at every step.