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.

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.

Seek first what is true and of value, and then whatever happiness follows will be of the appropriate quantity and, more importantly, quality.

Anger clearly has its proper place at work, which is neither wholly absent nor ever present. The manager who is an emotional blank is just as hard to work for as the volcanic boss, and both can do great harm by setting an unhelpful example for what kind of emotional expression is expected and accepted.

No one who has understood even a fraction of what science has told us about the universe can fail to be in awe of both the cosmos and of science.

There is such a thing as fanaticism, it is always wrong, and if you disagree, you're wrong too.

Most people believe, more or less, that the value of a human life is the same, irrespective of where on the planet it happens to find itself. But, of course, not every life has the same value for us.