“I have often wondered how it is that every man loves himself more than all the rest of men, but yet sets less value on his own opinion of himself than on the opinion of others.”

“A man should always have these two rules in readiness. First, to do only what the reason of your ruling and legislating faculties suggest for the service of man. Second, to change your opinion whenever anyone at hand sets you right and unsettles you in an opinion, but this change of opinion should come only because you are persuaded that something is just or to the public advantage, not because it appears pleasant or increases your reputation.”

“Nowhere can man find a quieter or more untroubled retreat than in his own soul.”

“It is a ridiculous thing for a man not to fly from his own badness, which is indeed possible, but to fly from other men's badness, which is impossible.”

“Life is opinion.”

“Casting aside other things, hold to the precious few; and besides bear in mind that every man lives only the present, which is an indivisible point, and that all the rest of his life is either past or is uncertain. Brief is man's life and small the nook of the earth where he lives; brief, too, is the longest posthumous fame, buoyed only by a succession of poor human beings who will very soon die and who know little of themselves, much less of someone who died long ago.”

“You always own the option of having no opinion. There is never any need to get worked up or to trouble your soul about things you can't control. These things are not asking to be judged by you. Leave them alone.”