Ten years have now passed since many of us first felt the jolt of history-when the second plane crashed into the South Tower of the World Trade Center. We knew from that moment that things can go terribly wrong in our world-not because life is unfair, or moral progress impossible, but because we have failed, generation after generation, to abolish the delusions of our ignorant ancestors.

Unreason is now ascendant in the United States - in our schools, in our courts, and in each branch of the federal government. Only 28 percent of Americans believe in evolution; 68 percent believe in Satan. Ignorance in this degree, concentrated in both the head and belly of a lumbering superpower, is now a problem for the entire world.

The fact that my continuous and public rejection of Christianity does not worry me in the least should suggest to you just how inadequate I think your reasons for being a Christian are.

Meditation puts into question more or less everything you tend to do in your search for happiness. But if you lose sight of this, it can become just another strategy for seeking happiness - a more refined version of the problem you already have.

Most people believe that the Creator of the universe wrote (or dictated) one of their books. Unfortunately, there are many books that pretend to divine authorship, and each makes incompatible claims about how we all must live.

The habit of spending nearly every waking moment lost in thought leaves us at the mercy of whatever our thoughts happen to be. Meditation is a way of breaking this spell.

The core of science is not a mathematical modeling--it is intellectual honesty. It is a willingness to have our certainties about the world constrained by good evidence and good argument.