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. Cf. Isoc. 1.46 
 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. Apparently borrowed form Thales . See
 Diog. Laert. 1.36 
 e)a\n toi=s a)llois e)pitimw=men au)toi\ drw=men .
 Cf. Isoc. 1.14 and note. 
 If you love knowledge, you will be a master of knowledge. Sandys quotes from Ascham's Scholemaster : “Isocrates did cause to be
 written at the entrie of his schole, in golden letters, this golden sentence, e)a\n h)=|s filomaqh/s, e)/sh| polumaqh/s , which
 excellentlie said in Greek, is thus rudelie in English, ‘If thous lovest lerning, thou
 shalt attayne to moch learning.’” The words were in fact inscribed “in golden letters”
 over the portal to Shrewsbury School. 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 Echoed unmistakably from
 Theog. 71-2 : a)lla\ met' e)sqlo\n
 i)w\n bouleu/eo polla\ mogh/sas kai\ makrh\n possi/n, *ku/rn', o(do\n
 e)ktele/sas . 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. Cf. Hom. Il. 13.636 
 pa/ntwn me\n ko/ros e)sti/ ; Aristoph. Pl. 189 
 tw=n me\n ga\r a)/llwn e)sti\ pa/ntwn
 plhsmonh/ .