“If an idea, I reasoned, were really a valuable one, there must be some way of realising it. The idea of winning a doctor's degree gradually assumed the aspect of a great moral struggle, and the moral fight possessed great attraction for me.”

Interview with Conrad Bodman, curator at the Barbican Arts Centre (2001)
Context: Ideas must be put to the test. That's why we make things, otherwise they would be no more than ideas. There is often a huge difference between an idea and its realisation. I've had what I thought were great ideas that just didn't work. Sometimes it's difficult to say if something has worked or not. Photography is a way of putting distance between myself and the work which sometimes helps me to see more clearly what it is that I have made.

Joshua Greene, Moral Tribes: Emotion, Reason, and the Gap Between Us and Them (2013), p. 106

Oui interview (1979)
Context: There’s no reason to assume that my idea of what‘s better would really be better. I resent it when other people try to inflict their ideas of betterness on me. I don’t think they know. And I can’t see any authority on the horizon that’s got any answers that seem worthwhile. Most of the things that are suggested are probably detrimental to your mental health.

Omnipotence and Other Theological Mistakes (1984)

Context: I do have a strong faith and always have had, I’m not a regular churchgoer now but I’m in church a lot – to do readings, to attend events and so on. I had a strong church upbringing which I think has been invaluable to me in terms of a moral compass – of some idea of what’s acceptable and what is not acceptable. I have a Presbyterian nature in that I like its ideas of individual responsibility and democracy. I’m naturally suspicious of people who wear religion heavily on their sleeves – that’s just not me and my style.

1940s, Religion and Science: Irreconcilable? (1948)

as quoted by John Horgan, The End of Science: Facing the Limits of Knowledge in the Twilight of the Scientific Age (1996)
Context: Generally speaking, all the really great ideas of physics are really spin-offs of string theory... Some of them were discovered first, but I consider that a mere accident of the development on planet earth. On planet earth, they were discovered in this order [general relativity, quantum field theory, superstrings, and supersymmetry]... But I don't believe, if there are many civilizations in the universe, that those four ideas were discovered in that order in each civilization.