A fool who has a flash of wit creates astonishment and scandal, like hack-horses setting out to gallop
You can fool all the people some of the time, and some of the people all the time, but you cannot fool all the people all the time
There are more fools than knaves in the world, else the knaves would not have enough to live upon
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former
Any fool can make things bigger, more complex, and more violent. It takes a touch of genius - and a lot of courage - to move in the opposite direction
It is a great piece of folly to sacrifice the inner for the outer man
A fool is one whom simpletons believe to be a man on merit
He who lives without committing any folly is not so wise as he thinks
No man is exempt from saying silly things; the mischief is to say them deliberately


On Anger: "For every minute you remain angry, you give up sixty seconds of peace of mind."
On Destiny: "Our destiny exercises its influence over us even when, as yet, we have not learned its nature: it is our future that lays down the law of our today."
Human, All Too Human
On Friendship: "A crowd is not company; and faces are but a gallery of pictures; and talk but a tinkling cymbal, where there is no love."