It pays to be obvious, especially if you have a reputation for subtlety.

The easiest way to solve a problem is to deny it exists.

No vision of God and heaven ever experienced by the most exalted prophet can, in my opinion, match the vision of the universe as seen by Newton or Einstein

To all my gentle readers who have treated me with love for over 30 years, I must say farewell. It has always been my ambition to die in harness with my head face down on a keyboard and my nose caught between two of the keys, but that's not the way it worked out. I have had a long and happy life and I have no complaints about the ending, thereof, and so farewell - farewell.

Emotionally I am an atheist. I don't have the evidence to prove that God doesn't exist, but I so strongly suspect he doesn't that I don't want to waste my time.

The greatest weapons in the conquest of knowledge are an understanding mind and the inexorable curiosity that drives it on.

I have never written a book that didn't teach me far more than it taught my reader.