“Proponents of doctrinal religions—ones in which a particular body of belief is prized and infidels scorned—will be threatened by the courageous pursuit of knowledge. We hear from such people that it may be dangerous to probe too deeply. Many people have inherited their religion like their eye color: they consider it not a thing to think very deeply about, and in any case beyond our control. But those with a set of beliefs they profess to feel deeply about, which they have selected without an unbiased sifting through the facts and the alternatives, will feel uncomfortably challenged by searching questions. Anger at queries about our beliefs is the body’s warning signal: here lies unexamined and probably dangerous doctrinal baggage.”
Source: Broca's Brain (1979), Chapter 23, “A Sunday Sermon” (pp. 339-340)
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Carl Sagan 365
American astrophysicist, cosmologist, author and science ed… 1934–1996Related quotes

Source: A Relation of the Conference betweene William Lawd...and Mr. Fisher the Jesuite (1639), quoted in The Works of the Most Reverend Father in God, William Laud, sometime Lord Archbishop of Canterbury. Volume II: Conference with Fisher (1849), p. 141

The Unity of Religious Ideals, Part I : Seeking for the Ideal.
The Spiritual Message of Hazrat Inayat Khan

1880s
Source: Except from a speech https://api.parliament.uk/historic-hansard/commons/1883/apr/26/second-reading-adjourned-debate-second in the House of Commons (26 April 1883) in support of the atheist Charles Bradlaugh being permitted to take his seat in Parliament.

2009, A New Beginning (June 2009)
Context: Around the world, the Jewish people were persecuted for centuries, and anti-Semitism in Europe culminated in an unprecedented Holocaust. Tomorrow, I will visit Buchenwald, which was part of a network of camps where Jews were enslaved, tortured, shot and gassed to death by the Third Reich. Six million Jews were killed -- more than the entire Jewish population of Israel today. Denying that fact is baseless, it is ignorant, and it is hateful. Threatening Israel with destruction or repeating vile stereotypes about Jews is deeply wrong, and only serves to evoke in the minds of Israelis this most painful of memories, while preventing the peace that the people of this region deserve. On the other hand, it is also undeniable that the Palestinian people -- Muslims and Christians -- have suffered in pursuit of a homeland. For more than sixty years they have endured the pain of dislocation. Many wait in refugee camps in the West Bank, Gaza, and neighboring lands for a life of peace and security that they have never been able to lead. They endure the daily humiliations large and small that come with occupation. So let there be no doubt: the situation for the Palestinian people is intolerable.

When asked how the world had changed following the September 11, 2001 attacks
Has the world changed? http://books.guardian.co.uk/writersreflections/story/0,1367,567546,00.html, The Guardian (October 11, 2001)

The Paris Review interview (2010)
Context: Three things are in your head: First, everything you have experienced from the day of your birth until right now. Every single second, every single hour, every single day. Then, how you reacted to those events in the minute of their happening, whether they were disastrous or joyful. Those are two things you have in your mind to give you material. Then, separate from the living experiences are all the art experiences you’ve had, the things you’ve learned from other writers, artists, poets, film directors, and composers. So all of this is in your mind as a fabulous mulch and you have to bring it out. How do you do that? I did it by making lists of nouns and then asking, What does each noun mean? You can go and make up your own list right now and it would be different than mine. The night. The crickets. The train whistle. The basement. The attic. The tennis shoes. The fireworks. All these things are very personal. Then, when you get the list down, you begin to word-associate around it. You ask, Why did I put this word down? What does it mean to me? Why did I put this noun down and not some other word? Do this and you’re on your way to being a good writer. You can’t write for other people. You can’t write for the left or the right, this religion or that religion, or this belief or that belief. You have to write the way you see things.