The truths of religion are never so well understood as by those who have lost the power of reason.

Only crime and the criminal, it is true, confront us with the perplexity of radical evil; but only the hypocrite is really rotten to the core.

I'm not as famous as Stephen Hawking, but certainly in the U.S., I have a very high profile for a scientist. It is an awesome responsibility, one that I don't shoulder lightly.

If there is something to pardon in everything, there is also something to condemn.

All violence consists in some people forcing others, under threat of suffering or death, to do what they do not want to do.