“Anyone being flown to a distant city for heart-bypass surgery has conceded, tacitly at least, that we have learned a few things about physics, geography, engineering, and medicine since the time of Moses.”

“Imagine that we could revive a well-educated Christian of the fourteenth century. The man would prove to be a total ignoramus, except on matters of faith. His beliefs about geography, astronomy, and medicine would embarrass even a child, but he would know more or less everything there is to know about God.”

“It is time we recognized that the only thing that permits human beings to collaborate with one another in a truly open-minded way is their willingness to have their beliefs modified by new facts.”

“Just as there is no such thing as Christian physics or Muslim Algebra, we will see tht there is no such thing as Christian or Muslim morality.”

“A three-day-old human embryo is a collection of 150 cells called a blastocyst. There are, for the sake of comparison, more than 100,000 cells in the brain of a fly. The human embryos that are destroyed in stem-cell research do not have brains, or even neurons. Consequently, there is no reason to believe they can suffer their destruction in any way at all. It is worth remembered, in this context, that when a person's brain has died, we currently deem it acceptable to harvest his organs (provided he has donated them for this purpose) and bury him in the ground. If it is acceptable to treat a person whose brain has died as something less than a human being, it should be acceptable to treat a blastocyst as such. If you are concerned about suffering in this universe, killing a fly should present you with greater moral difficulties than killing a human blastocyst.Perhaps you think that the crucial difference between a fly and a human blastocyst is to be found in the latter's potential to become a fully developed human being. But almost every cell in your body is a potential human being, given our recent advances in genetic engineering. Every time you scratch your nose, you have committed a Holocaust of potential human beings.”

“Religious moderation springs from the fact that even the least educated person among us simply knows more about certain matters than anyone did two thousand years ago.”

“For nearly a century, the moral relativism of science has given faith-based religion--that great engine of ignorance and bigotry--a nearly uncontested claim to being the only universal framework for moral wisdom. As a result, the most powerful societies on early spend their time debating issues like gay marriage when they should be focused on problems like nuclear proliferation, genocide, energy security, climate change, poverty, and failing schools.”