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)

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