If there is an art of living, it is not something that can be taught timelessly. We have lessons to learn from Aristotle et al, for sure, but not if we simply uproot them from their epoch and stamp them into 21st-century soil.

The very act of questioning whether you exist proves you do, because you must be there for the doubt to be entertained in the first place.

No one has ever understood anything better by assuming that there is no reason for why it is the way it is.

I think that a lot of social movements, political movements, powerful ones - certainly they form, collectively, an idea of the truth which becomes hard to question. It becomes a dogma, and from the inside it starts to look like common sense.

From time to time, it is worth wandering around the fuzzy border regions of what you do, if only to remind yourself that no human activity is an island.

The idea that the mind can extend even beyond the body is an intriguing one, and is bound to become more pressing as we increasingly develop technologies that augment our natural abilities.

Atheists should point out that life without God can be meaningful, moral and happy.