Life is short. Nevertheless, billions of people invest incalculable hours making fruitless pleas to nonexistent gods, participating in lavish rituals with no tangible effects, and whittling away tight budgets to support extravagant religious institutions or "spiritual advisors." Worse still, antiquated religious ideas lead people to impose needless hardships on themselves and others, to rationalize discrimination and other forms of mistreatment, and to hasten environmental destruction because they believe that "the end of the world" is imminent anyway. And for every outward manifestation of wasteful, counterproductive, and even downright harmful activity motivated only by religious belief, there are countless instances that are not nearly so obvious. Religious belief has exacted a toll on people's emotional well-being as well. Just how much energy has been drained searching for meaning where none is to be found, or been squandered on false hopes and unwarranted fears? How many believers have agonized over the uncertain destination of their loved ones after death? How many have struggled to discern exactly what they did to displease God after falling victim to a natural disaster? How many have been tormented trying to make sense of why God allows terrible things to happen to good people? In the absence of any clear revelation about what God wants us to do, how many have fretted about whether their own actions or beliefs, or those of the people dearest to them, are enough to avoid hellfire? How many of those who have lost their faith in old age have looked back at all the missed opportunities, the roads not taken, the life that could have been, had they not been born in a religious household, or had they abandoned religion in their younger days!

Thus the mildest criticism of religion is also the most radical and the most devastating one. Religion is man-made. Even the men who made it cannot agree on what their prophets or redeemers or gurus actually said or did. Still less cn they hope to tell us the "meaning" of later discoveries and developments which were, when they began, either obstructed by their religion or denounced by them. And yet — the believers still claim to know! Not just to know, but to know everything. Not just to know that god exists, and that he created and supervised the whole enterprise, but also to know what "he" demands of us — from our diet to our observances to our sexual morality. In other words, in a vast and complicated discussion where we know more and more about less and less, yet can still hope for some enlightenment as we proceed, one faction — itself composed of warring factions — has the sheer arrogance to tell us that we already have all the essential information we need. Such stupidity, combined with such pride, should be enough on its own to exclude "belief" from the debate. The person who is certain, and who claims divine warrant for his certainty, belongs now to the infancy of our species. It may be a long farewell, but it has begun and, like all farewells, should not be protracted.

There still remain four irreducible objections to religious faith: that it wholly misrepresents the origins of man and the cosmos, that because of this original error it manages to combine the maximum of servility with the maximum of solipsism, that it is both the result and the cause of dangerous sexual repression, and that it is ultimately grounded on wish-thinking.

The reason I find fundamentalism so troubling — whether it is Christian, Jewish or Muslim — is not just its willingness to use violence (in the Islamist manifestation). It is its inability to integrate doubt into faith, its resistance to human reason, its tendency to pride and exclusion, and its inability to accept mystery as the core reality of any religious life. You find it troubling, I think, purely because it upholds truths that cannot be proved empirically or even, in some respects, logically. In that sense, of course, I think you have no reason to dislike or oppose it any more than you would oppose my kind of faith. Your argument allows for no solid distinctions within faiths; my argument depends on such distinctions.

Just because your voice reaches halfway around the world doesn't mean you are wiser than when it reached only to the end of the bar.

Priests and academics born into Catholicism tend to know all the inside stories, the flaws and foibles and legendary figures of the Church, and can regale one another with the rich lore of its characters and scandals. It is one big extended family. In that company, status is often contingent upon demonstrating that one has transcended the "Catholic ghetto." That explains, at least in large part, why dissent from official teaching carries the panache of being sophisticated. The disposition is: "Yes, I am a Catholic (or a priest, or a theologian), but I think for myself." The remarkably improbable assumption is that what one thinks up by oneself is more interesting than what the Church teaches.

How should scientists respond to the allegation that our "faith" in logic and scientific truth is just that — faith — not "privileged" over alternative truths? An obvious response is that science gets results. As I once wrote, "Show me a cultural relativist at 30,000 feet, and I'll show you a hypocrite... If you are flying to an international congress of anthropologists or literary critics, the reason you will probably get there — the reason you don't plummet into a ploughed field — is that a lot of Western scientifically trained engineers have got their sums right." Science supports its claim to truth by its spectacular ability to make matter and energy jump through hoops, and to predict what will happen and when.

Christian belief is produced by a cognitive process (the "internal instigation of the Holy Spirit" [in Aquinas' words] or the "internal testimony of the Holy Spirit" [in Calvin's words] functioning properly in an appropriate epistemic environment according to a design plan successfully aimed at truth.

We all like to believe we are more rational than we really are. The painful truth is that we are naturally inclined to believe what we want to believe, and we may adopt some fashionable intellectual scheme because it allows us to feel superior to other people, especially those unenlightened masses who need the crutch or the discipline of religion. Of course people may also adopt a religious creed in order to justify themselves, especially in times or places where religion is fashionable. Everybody is subject to the temptation to rationalize. The temptation is probably greatest for those with the most intelligence because the more intelligent we are, the easier we will find it to invent convenient rationalizations for what we want to believe and to decorate them with high-sounding claptrap. Unless we take the greatest precautions, we will use our reasoning powers to convince ourselves to believe reassuring lies rather than the uncomfortable truths that reality may be trying to tell us.