Muslims must learn that if they make belligerent and fanatical claims upon the tolerance of free societies, they will meet the limits of that tolerance.

Almost all our suffering is the product of our thoughts. We spend nearly every moment of our lives lost in thought, and hostage to the character of those thoughts. You can break this spell, but it takes training just like it takes training to defend yourself against a physical assault.

It is terrible that we all die and lose everything we love; it is doubly terrible that so many human beings suffer needlessly while alive. That so much of this suffering can be directly attributed to religion—to religious hatreds, religious wars, religious delusions and religious diversions of scarce resources—is what makes atheism a moral and intellectual necessity.

There's no way to reconcile Islam with Christianity. This difference of opinion admits of compromise as much as a coin toss does.

Lying is, almost by definition, a refusal to cooperate with others. It condenses a lack of trust and trustworthiness into a single act. It is both a failure of understanding and an unwillingness to be understood. To lie is to recoil from relationship.

Death is, in some ways, unacceptable. It's just an astonishing fact of our being here that we die; but I think worse than that is if we live long enough, we lose everyone we love in this world. I mean people die and disappear, and we're left with this stark mystery: just the sheer not knowing of what happened to them.

Science does not limit itself merely to what is currently verifiable. But it is interested in questions that are potentially verifiable (or, rather, falsifiable).