Don't take yourself so seriously. You're just a monkey with a plan.
—Naval Ravikant
Do not spoil what you have by desiring what you have not; remember that what you now have was once among the things you only hoped for.
—Epicurus
If you only wished to be happy, this could be easily accomplished; but we wish to be happier than other people, and this is always difficult, for we believe others to be happier than they are.
—Montesquieu