To Demonicus (16-20)

Never hope to conceal any shameful thing which you have done; for even if you do conceal it from others, your own heart will know. Fear the gods, honor your parents, respect your friends, obey the laws. Pursue the enjoyments which are of good repute; for pleasure attended by honor is the best thing in the world, but pleasure without honor is the worst.[*]

Guard yourself against accusations, even if they are false; for the multitude are ignorant of the truth and look only to reputation. In all things resolve to act as though the whole world would see what you do; for even if you conceal your deeds for the moment, later you will be found out. But most of all will you have the respect of men, if you are seen to avoid doing things which you would blame others for doing.[*]

If you love knowledge, you will be a master of knowledge.[*] What you have come to know, preserve by exercise; what you have not learned, seek to add to your knowledge; for it is as reprehensible to hear a profitable saying and not grasp it as to be offered a good gift by one's friends and not accept it. Spend your leisure time in cultivating an ear attentive to discourse, for in this way you will find that you learn with ease what others have found out with difficulty.

Believe that many precepts are better than much wealth; for wealth quickly fails us, but precepts abide through all time; for wisdom alone of all possessions is imperishable. Do not hesitate to travel a long road[*] to those who profess to offer some useful instruction; for it were a shame, when merchants cross vast seas in order to increase their store of wealth, that the young should not endure even journeys by land to improve their understanding.

Be courteous in your manner, and cordial in your address. It is the part of courtesy to greet those whom you meet; and of cordiality to enter into friendly talk with them. Be pleasant to all, but cultivate the best; thus you will avoid the dislike of the former and have the friendship of the latter. Avoid frequent conversations with the same persons, and long conversations on the same subject; for there is satiety in all things.[*]