Agnosticism is a perfectly respectable and tenable philosophical position; it is not dogmatic and makes no pronouncements about the ultimate truths of the universe. It remains open to evidence and persuasion; lacking faith, it nevertheless does not deride faith. Atheism, on the other hand, is as unyielding and dogmatic about religious belief as true believers are about heathens. It tries to use reason to demolish a structure that is not built upon reason; because, though rational argument may take us to the edge of belief, we require a "leap of faith" to jump the chasm.

Atheists, Like Fundamentalists, are Dogmatic - Pieces of Eight (1982)