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.

If philosophy is to be a valuable part of life, we have to appreciate it for its own sake, and not just for what it’s done for us lately.

Philosophy has to be enquiring; it can take nothing on faith, and its methods are based not on the blind acceptance of authority, but on establishing truths by reason and argument.

I don’t feel proprietorial about the problems of philosophy. History has taught us that many philosophical issues can grow up, leave home and live elsewhere.

Philosophy is at its most engaged when it is impure. What is being recovered from the Ancient Greek model is not some lost idea of philosophy’s pure essence, but the idea that philosophy is mixed up with everything else.