Against stupidity, the gods themselves contend in vain. (Friedrich von Schiller)

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)

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

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