You don't stop laughing because you grow old. You grow old because you stop laughing.
The moment we begin to fear the opinions of others and hesitate to tell the truth that is in us, and from motives of policy are silent when we should speak, the divine floods of light and life no longer flow into our souls.
I daresay one profits more by the mistakes one makes off one's own bat than by doing the right thing on somebody's else advice.
It's the opinion of some that crops could be grown on the moon. Which raises the fear that it may not be long before we're paying somebody not to.
Don't ever take a fence down until you know the reason it was put up.
O, it is excellent to have a giant's strength; but it is tyrannous to use it like a giant.
Against stupidity the gods themselves contend in vain.