The idea that there is a sharp boundary between our true, inner selves and the outside world is pervasive, but highly questionable. The boundaries of the self might well be more porous than we ordinarily think.

No genuine choice is ever simply a matter of the arbitrary exercise of will. Take your choice of lunch today. You can't decide to want anything, but what you want will at least in part be a result of a series of other choices and judgments you've made in your life to date.

The border between the natural and the supernatural, religion and philosophy, may not always be clear. But there are lines and we should know and accept which side of it we are on.

I am very Aristotelian in approach - not in detail - so I always find I'm saying things that get people frustrated like 'It's a matter of balance and judgement'. To a lot of philosophers these are terrible words because they're admitting of vagueness and uncertainty. The more I've done philosophy, the more I've become convinced that that is the way it is.

No matter how convinced we are that someone is nasty, evil or just plain criminal, if they have not been convicted of any crime and support views that are upheld and defended by many law-abiding citizens, the only way to tackle them is through democratic debate.

Economics is uncertain because its fundamental subject matter is not money but human action. That's why economics is not the dismal science, it's no science at all.

Science works because the phenomenon being described can be relied on to remain the same. Even in quantum physics, where phenomena are changed by observation, the way in which observation interferes is regular and falls within a limited range of possibilities. Human culture, however, has the nasty habit of never staying the same for very long.