Turing was a quite brilliant mathematician, most famous for his work on breaking the German Enigma codes. It is no exaggeration to say that, without his outstanding contribution, the history of the Second World War could have been very different.
Christians do not say that people should be reduced merely to what they can produce or what they can buy - that we should let the weak go under and only the strong survive. No, we say, 'Do to others what you would have them do unto you.'
When people criticise you, you've got to listen to that criticism, and to learn from it, which I've tried to do.
So another challenge for our generation is to create global institutions that reflect our ideas of fairness and responsibility, not the ideas that were the basis of the last stage of financial development over these recent years.
Why is playing football in Europe considered the pinnacle of our game, yet in other spheres of life, that same phrase - 'being in Europe' - is dismissed with suspicion?
I love Scotland; I love the NHS. I was born into the NHS; I grew up in the NHS. My family grew up in the NHS.
If our economies are to flourish, if global poverty is to be banished, and if the wellbeing of the world's people enhanced - not just in this generation but in succeeding generations - we must make sure we take care of the natural environment and resources on which our economic activity depends.
I'm all for greater co-operation between Europe and America because I think that sometimes we've missed out on the benefits that transatlantic trade could give both continents, and I've been pressing this since 1997.
I think it's important that people know who you are and... can ask any questions they like about you.
Climate change is a consequence of the build up of greenhouse gases over the past 200 years in the atmosphere, and virtually all these emissions came from the rich countries.
Do you think that I or anybody else who cares about the NHS would stand by and do nothing if we thought the NHS was going to be privatised in Scotland and its funds were going to be cut? Would we stand back and do nothing without a fight? Of course not.
The growing evidence of climate change is forcing attention on carbon emissions and their reduction.
While you cannot deliver policies without principles, you cannot deliver principles without having power. You have quickly to move to a stage where, emphasising your principles, you build a programme, then call for popular support.
You cannot have Rwanda again because information would come out far more quickly about what is actually going on, and the public opinion would grow to the point where action would need to be taken.