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I used to be scared of uncertainty; now I get a high out of it.

I tried to develop some theories that took account of the uncertainty in the world and the complexity in the world.

I have devoted my life to uncertainty. Certainty is the death of wisdom, thought, creativity.

Exploring the unknown requires tolerating uncertainty.

Although our intellect always longs for clarity and certainty, our nature often finds uncertainty fascinating.

From my earliest days, I was fascinated by science.

I think that when we know that we actually do live in uncertainty, then we ought to admit it; it is of great value to realize that we do not know the answers to different questions. This attitude of mind - this attitude of uncertainty - is vital to the scientist, and it is this attitude of mind which the student must first acquire.

In science fiction, basic doubts featured prominently in the worlds of Philip K. Dick. I knew Phil for 25 years, and he was always getting onto me, a scientist. He was a great fan of quantum uncertainty, epistemology in science, the lot.

Also by my earliest days, I was fascinated by a utopian vision of what the world could be like. I've thought that science could be the basis for a better world, and that's what I've been trying to do all these years.

When I was younger, I really struggled with confidence.