I worry that, especially as the Millennium edges nearer, pseudo-science and superstition will seem year by year more tempting, the siren song of unreason more sonorous and attractive.

I don't know the answer. Maybe no one knows. Maybe when you grow up, you'll be the first to find out.

I consider it an extremely dangerous doctrine, because the more likely we are to assume that the solution comes from the outside, the less likely we are to solve our problems ourselves.

Our concern for the future can be tested by how well we support our libraries.

[Science] is not perfect. It can be misused. It is only a tool. But it is by far the best tool we have, self-correcting, ongoing, applicable to everything. It has two rules. First: there are no sacred truths; all assumptions must be critically examined; arguments from authority are worthless. Second: whatever is inconsistent with the facts must be discarded or revised. ... The obvious is sometimes false; the unexpected is sometimes true.

Every cell is a triumph of natural selection, and we’re made of trillions of cells. Within us, is a little universe.

If we say that God has always been, why not save a step and conclude that the universe has always been?