The fundamental cause of trouble in the world is that the stupid are cocksure while the intelligent are full of doubt. (Bertrand Russell)

A people that values its privileges above its principles soon loses both. (Dwight D. Eisenhower , Inaugural Address, January 20, 1953)

If you can count your money, you don’t have a billion dollars. (J. Paul Getty)

A mathematician is a device for turning coffee into theorems. (Paul Erdos)

Nothing in the world is more dangerous than sincere ignorance and conscientious stupidity. (Martin Luther King Jr.)

Human history becomes more and more a race between education and catastrophe. (H. G. Wells)

When you do the common things in life in an uncommon way, you will command the attention of the world. (George Washington Carver)

Black holes are where God divided by zero. (Steven Wright)

In theory, there is no difference between theory and practice. But in practice, there is. (Yogi Berra)

All are lunatics, but he who can analyze his delusion is called a philosopher. (Ambrose Bierce)

I don’t know why we are here, but I’m pretty sure that it is not in order to enjoy ourselves. (Ludwig Wittgenstein)