Children, who have so much to learn in so short a time, had involved the tendency to trust adults to instruct them in the collective knowledge of our species, and this trust confers survival value. But it also makes children vulnerable to being tricked and adults who exploit this vulnerability should be deeply ashamed.

Philosophers feel a little more cautious about letting down their technical guard lest the general public doesn't recognize their special credentials. It's the fact that philosophy is of general interest that, paradoxically, keeps philosophers from wanting to speak in a way that's accessible to the general public.

Math . . . music .. . starry nights . . . These are secular ways of achieving transcendence, of feeling lifted into a grand perspective. It's a sense of being awed by existence that almost obliterates the self. Religious people think of it as an essentially religious experience but it's not. It's an essentially human experience.

I would say to anybody who thinks that all the problems in philosophy can be translated into empirically verifiable answers - whether it be a Lawrence Krauss thinking that physics is rendering philosophy obsolete or a Sam Harris thinking that neuroscience is rendering moral philosophy obsolete - that it takes an awful lot of philosophy - philosophy of science in the first case, moral philosophy in the second - even to demonstrate the relevance of these empirical sciences.

Plato's concern is not just an intellectual issue, but it is knitted with emotional life as well.

To matter ... Is there any human will deeper than that? ... We don't want to live when we become convinced that we don't, can't, will never matter. ... We no sooner discover that we are than we desperately want that which we are to matter.

When the first people started to argue against slavery, for example, this was a new idea. If you crowd-source, you'd never come up with this. And so the - exactly the kind of progress we've made couldn't be made if we depend it on crowd-sourcing.