Letter 3 — On True and False Friendship (§4)

“There is a class of men who communicate, to anyone whom they meet, matters which should be revealed to friends alone, and unload upon the chance listener whatever irks them. Others, again, fear to confide in their closest intimates; and if it were possible, they would not trust even themselves, burying their secrets deep in their hearts. But we should do neither. It is equally faulty to trust everyone and to trust no one. Yet the former fault is, I should say, the more ingenuous, the latter the more safe.”