Niels "Never" Bohr-ing

Sorry about the awful pun but the Danish physicist is one of my new heros. A brilliant thinker and eminently quotable, which is how I'd like to be remembered. Fat chance, though.

Here are a selection of his best quotes:

An expert is someone who knows some of the worst mistakes, which can be made, in a very narrow field.

Never express yourself more clearly than you are able to think.

No, no, you're not thinking; you're just being logical.

Prediction is very difficult, especially if it's about the future.

We are all agreed that your theory is crazy. The question which divides us is whether it is crazy enough to be correct.