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 from Thales. See Diog. Laert. 1.36 ἐὰν τοῖς ἀλλοις ἐπιτιμῶμεν αὐτοὶ δρῶμεν. Cf. Isoc. 1.14 and note.

If you love knowledge, you will be a master of knowledge.Sandys quotes from Ascham’s : “Isocrates did cause to be written at the entrie of his schole, in golden letters, this golden sentence, ἐὰν ᾖς φιλομαθής, ἔσῃ πολυμαθής, 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.