The happiness of your life depends upon the quality of your thoughts: therefore, guard accordingly, and take care that you entertain no notions unsuitable to virtue and reasonable nature.
Time is a sort of river of passing events, and strong is its current no sooner is a thing brought to sight than it is swept by and another takes its place, and this too will be swept away.
Vex not thy spirit at the course of things; they heed not thy vexation. How ludicrous and outlandish is astonishment at anything that may happen in life.
We ought to do good to others as simply as a horse runs, or a bee makes honey, or a vine bears grapes season after season without thinking of the grapes it has borne.