The Romans called the Christians atheists. Why? Well, the Christians had a god of sorts, but it wasn't a real god. They didn't believe in the divinity of apotheosized emperors or Olympian gods. They had a peculiar, different kind of god. So it was very easy to call people who believed in a different kind of god atheists. And that general sense that an atheist is anybody who doesn't believe exactly as I do prevails in our own time.
Carl SaganWe've arranged a civilization in which most crucial elements profoundly depend on science and technology.
Carl SaganHow is it that hardly any major religion has looked at science and concluded, โThis is better than we thought! The Universe is much bigger than our prophets said, grander, more subtle, more elegant?โ Instead they say, โNo, no, no! My god is a little god, and I want him to stay that way.โ A religion, old or new, that stressed the magnificence of the Universe as revealed by modern science might be able to draw forth reserves of reverence and awe hardly tapped by the conventional faiths.
Carl Sagan