Purge your mind of all aimless and idle thoughts, especially those that pry into the affairs of others or wish them ill.

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

If any man can convince me and bring home to me that I do not think or act aright, gladly will I change; for I search after truth, by which man never yet was harmed. But he is harmed who abideth on still in his deception and ignorance.

... Allow yourself a space of quiet, wherein you can add to your knowledge of the Good and learn to curb your restlessness. Guard also against another kind of error: the folly of those who weary their days in much business, but lack any aim on which their whole effort, nay, their whole thought, is focused.

What is not good for the swarm is not good for the bee.

Put it out of the power of truth to give you an ill character. If anybody reports you not to be an honest man let your practice give him the lie.

The honest and good man ought to be exactly like a man who smells strong, so that the bystander as soon as he comes near him must smell whether he choose or not.