Quote by Carl Sagan

In every country, we should be teaching our children the scientific method and the reasons for a Bill of Rights. With it comes a certain decency, humility and community spirit. In the demon-haunted world that we inhabit by virtue of being human, this may be all that stands between us and the enveloping darkness.

Please suggest source details if you know: book, page, year, online article address (url), correction (different author...), etc.. Thanks.