But the tools of skepticism are generally unavailable to the citizens of our society. They're hardly ever mentioned in the schools, even in the presentation of science, its most ardent practitioner, although skepticism repeatedly sprouts spontaneously out of the disappointments of everyday life. Our politics, economics, advertising, and religions (New Age and Old) are awash in credulity. Those who have something to sell, those who wish to influence public opinion, those in power, a skeptic might suggest, have a vested interest in discouraging skepticism.

Carl Sagan The Demon-Haunted World

I miss Dr. Sagan's presence in the world. I had the opportunity to see him in Seattle once during his final battle with the illness that took him. He was a great light. We are fortunate that we have his words and the lives of those he influenced.