“He is a wise man who does not grieve for the things which he has not, but rejoices for those which he has.”

“There is no man...however wise, who has not at some period in his youth said things, or lived a life, the memory of which is so unpleasant to him that he would gladly expunge it. And yet he ought not entirely to regret it, because he cannot be certain that he has indeed become a wise man...”

“He who is certain he knows the ending of things when he is only beginning them is either extremely wise or extremely foolish; no matter which is true, he is certainly an unhappy man, for he has put a knife in the heart of wonder.”

“If you sin yourself and grieve even unto death for your sins or for your sudden sin, then rejoice for others, rejoice for the righteous man, rejoice that if you have sinned, he is righteous and has not sinned.”

“It is not what he has, nor even what he does, which directly expresses the worth of a man, but what he is.”

“With the wise man, what he has does not cease to be enjoyable because some one else has something else. Envy, in fact, is one form of vice, partly moral, partly intellectual, which consists in seeing things never in themselves but only in their relations”