All fortune is good fortune; for it either rewards, disciplines, amends, or punishes, and so is either useful or just.

Contemplate the extent and stability of the heavens, and then at last cease to admire worthless things.

As far as possible, join faith to reason.

For in every ill-turn of fortune the most unhappy sort of unfortunate man is the one who has been happy

No man can ever be secure until he has been forsaken by Fortune.

Good men seek it by the natural means of the virtues; evil men, however, try to achieve the same goal by a variety of concupiscences, and that is surely an unnatural way of seeking the good. Don't you agree?

So nothing is ever good or bad unless you think it so, and vice versa. All luck is good luck to the man who bears it with equanimity.