We ought to flee the friendship of the wicked, and the enmity of the good.
Nothing is in reality either pleasant or unpleasant by nature but all things become so through habit
We should do everything both cautiously and confidently at the same time.
Men are not troubled by things themselves, but by their thoughts about them
Authentic happiness is always independent of external conditions.
By accepting life's limits and inevitabilities and working with them rather than fighting them, we become free.