There is nothing good or evil save in the will.

If you want to improve, be content to be thought foolish and stupid with regard to external things. Don't wish to be thought to know anything; and even if you appear to be somebody important to others, distrust yourself. For, it is difficult to both keep your faculty of choice in a state conformable to nature, and at the same time acquire external things. But while you are careful about the one, you must of necessity neglect the other

If what charms you is nothing but abstract principles, sit down and turn them over quietly in your mind: but never dub yourself a Philosopher.

The greater the difficulty the more glory in surmounting it. Skillful pilots gain their reputation from storms and tempests.

The world turns aside to let any man pass who knows where he is going.

Ask yourself: Does this appearance (of events) concern the things that are within my own control or those that are not? If it concerns anything outside your control, train yourself not to worry about it.

It is better to advise than upbraid, for the one corrects the erring; the other only convicts them.