I maintain the importance of an absolute prohibition against torture, while acknowledging that even absolute prohibitions can sometimes be broken. If that is a contradiction, it is a contradiction that ethics has to embrace, or else it becomes like glass: hard, clear, but fatally inflexible.

Christmas is a rare occasion when we are reminded that we have obligations to people we did not choose to be related to, and that love is not just a spontaneous feeling but something we sometimes really have to work at, with people we may not even much like.

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.

Truth and Truthfulness is an ambitious work, and its journeys into history give it a breadth unusual in these days of increased academic specialization. . . . William's book combines real history and fictional constructs to tell a revealing story that makes us reconsider the meaning of familiar concepts.

Science works because the phenomenon being described can be relied on to remain the same. Even in quantum physics, where phenomena are changed by observation, the way in which observation interferes is regular and falls within a limited range of possibilities. Human culture, however, has the nasty habit of never staying the same for very long.

It is true that legality is not morality, and sticking to the law is necessary for good citizenship, but it is not sufficient.

True virtue would never liken its rewards to points on a loyalty card, not because it is its own reward, but because it is not something we should practice to accrue future benefits.