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

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

Whenever I climb I am followed by a dog called ‘Ego’. (Friedrich Nietzsche)

Some cause happiness wherever they go; others, whenever they go. (Oscar Wilde)

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

If you can’t get rid of the skeleton in your closet, you’d best teach it to dance. (George Bernard Shaw)

Try to learn something about everything and everything about something. (Thomas Henry Huxley)

Talent does what it can; genius does what it must. (Edward George Bulwer-Lytton)