Mankind's greatest achievements have come about by talking and its greatest failures by not talking. It doesn’t have to be like this.

We got through all of Genesis and part of Exodus before I left. One of the main things I learned from this exercise was not to begin a sentence with "And." When I pointed out that most sentences in the Bible began with "And," I was told that English had changed since the time of King James. In that case, I argued, why make us read the Bible? But it was in vain. Robert Graves at that time was very keen on the symbolism and mysticism in the Bible.

Maybe I'm being a bit harsh on philosophers, but they have not been very kind to me... I have been variously called nominalist, an instrumentalist, a positivist, a realist, and several other ists. The technique seems refutation by denigration: If you can attach a label to my approach, you don't have to say what is wrong with it... I am sure that Einstein, Heisenberg and Dirac didn't worry about whether they were realists or instrumentalists.

Every man should marry. After all, happiness is not the only thing in life.

When I was first diagnosed with ALS, I was given two years to live. Now 45 years later, I am doing pretty well.

We are very, very small, but we are profoundly capable of very, very big things.

If time travel is possible, where are the tourists from the future?