Demand not that events should happen as you wish; but wish them to happen as they do happen, and you will go on well. - Epictetus

Begin therefore with little things. A little oil is spilled, a little wine is stolen: say, “This is the price of tranquility; this is the price of not being upset.

Whenever you do something you have decided ought to be done, never try to avoid being seen doing it, even if people in general may disapprove of it. If, of course, your action is wrong, just don't do it at all; but if it's right, why be afraid of people whose criticism is off the mark?

Every habit and faculty is confirmed and strengthened by the corresponding actions, that of walking by walking, that of running by running. If you wish to be a good reader, read; if you wish to be a good writer, write. If you should give up reading for thirty days one after the other, and be engaged in something else, you will know what happens. So also if you lie in bed for ten days, get up and try to take a rather long walk, and you will see how wobbly your legs are. In general, therefore, if you want to do something, make a habit of it; if you want not to do something, refrain from doing it, and accustom yourself to something else instead.