ON GOD:

"Because the word 'God' means many things to many people, I frequently reply [to people who ask 'Do you believe in God?'] by asking what the questioner means by 'God.' To my surprise, this response is often considered puzzling or unexpected: 'Oh, you know, God. Everyone knows who God is.' Or 'Well, kind of a force that is stronger than we are and that exists everywhere in the universe.' There are a number of such forces. One of them is called gravity, but it is not often identified with God. And not everyone does know what is meant by 'God.'...Whether we believe in God depends very much on what we mean by God.

My deeply held belief is that if a god of anything like the traditional sort exists, our curiosity and intelligence are provided by such a god. We would be unappreciative of those gifts (as well as unable to take such a course of action) if we suppressed our passion to explore the universe and ourselves. On the other hand, if such a traditional god does not exist, our curiosity and our intelligence are the essential tools for managing our survival. In either case, the enterprise of knowledge is consistent with both science and religion, and is essential for the welfare of the human species."

-"A Sunday Sermon," Broca's Brain, p. 291.

Source: http://www.skeptic.com/04.4.sagan-tribute.html