Only two things are infinite, the universe and human stupidity, and I’m not sure about the former. (Albert Einstein)

The true measure of a man is how he treats someone who can do him absolutely no good. (Samuel Johnson)

The power of accurate observation is frequently called cynicism by those who don’t have it. (George Bernard Shaw)

The difference between ‘involvement’ and ‘commitment’ is like an eggs-and-ham breakfast: the chicken was ‘involved’ – the pig was ‘committed’. (unknown)

It’s kind of fun to do the impossible. (Walt Disney)

Each problem that I solved became a rule which served afterwards to solve other problems. (Rene Descartes, Discours de la Methode)

When one person suffers from a delusion it is called insanity; when many people suffer from a delusion it is called religion. (Robert Pirsig)

I do not feel obliged to believe that the same God who has endowed us with sense, reason, and intellect has intended us to forgo their use. (Galileo Galilei)

If you are going through hell, keep going. (Sir Winston Churchill)

I’ve had a wonderful time, but this wasn’t it. (Groucho Marx)

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