Youth is wasted on the young.

If history repeats itself, and the unexpected always happens, how incapable must Man be of learning from experience.

A fool's brain digests philosophy into folly, science into superstition, and art into pedantry. Hence University education.

I would like to take you seriously, but to do so would be an affront to your intelligence.

It's not that I don't believe in creativity and innovation and new ideas, and the creativity that comes with fashion, which I really respect. But one of my biggest concerns is just how cheap we expect everything to be.

A man of genius makes no mistakes; his errors are volitional and are the portals of discovery.

Teaching physics at the University, and more general lecturing to wider audiences has been a major concern.

Smart people tend to enjoy thinking about a lot of things at once. I'd say entrepreneurs should be serial monogamists; do one thing at a time until you make sufficient progress and then move on.