“Monsieur … I do not believe in God; his existence has been disproved by Science. But in the concentration camp, I learned to believe in men.”

Quoted in " Goodbye Margherita Hack, “The Lady of the Stars.”", iitaly.org (1 July 2013) http://www.iitaly.org/magazine/focus/facts-stories/article/goodbye-margherita-hack-lady-stars?mode=colorbox.

The Third Notebook: Part One
No Longer Human

On the advisableness of improving natural knowledge (1866) http://www.gutenberg.org/dirs/etext01/thx1410.txt
1860s
Source: Collected Essays of Thomas Henry Huxley
Context: The improver of natural knowledge absolutely refuses to acknowledge authority, as such. For him, scepticism is the highest of duties; blind faith the one unpardonable sin. And it cannot be otherwise, for every great advance in natural knowledge has involved the absolute rejection of authority, the cherishing of the keenest scepticism, the annihilation of the spirit of blind faith; and the most ardent votary of science holds his firmest convictions, not because the men he most venerates hold them; not because their verity is testified by portents and wonders; but because his experience teaches him that whenever he chooses to bring these convictions into contact with their primary source, Nature — whenever he thinks fit to test them by appealing to experiment and to observation — Nature will confirm them. The man of science has learned to believe in justification, not by faith, but by verification.

Source: Echoes from the Bottomless Well (1985), p. 65

Source: Villette (1853), Chapter XXXVI: The Apple of Discord

2010s, 2013, Interview in La Repubblica
Context: I believe in God, not in a Catholic God, there is no Catholic God, there is God and I believe in Jesus Christ, his incarnation. Jesus is my teacher and my pastor, but God, the Father, Abba, is the light and the Creator. This is my Being.

Responding to audience questions during a speech in Detroit (1898); as recounted in Living My Life (1931), p. 207; quoted by Annie Laurie Gaylor in Women Without Superstition, p. 382
Context: Ladies and gentlemen, I came here to avoid as much as possible treading on your corns. I had intended to deal only with the basic issue of economics that dictates our lives from the cradle to the grave, regardless of our religion or moral beliefs. I see now that it was a mistake. If one enters a battle, he cannot be squeamish about a few corns. Here, then, are my answers: I do not believe in God, because I believe in man. Whatever his mistakes, man has for thousands of years past been working to undo the botched job your God has made.
As to killing rulers, it depends entirely on the position of the ruler. If it is the Russian Czar, I most certainly believe in dispatching him to where he belongs. If the ruler is as ineffectual as an American President, it is hardly worth the effort. There are, however, some potentates I would kill by any and all means at my disposal. They are Ignorance, Superstition, and Bigotry — the most sinister and tyrannical rulers on earth. As for the gentleman who asked if free love would not build more houses of prostitution, my answer is: They will all be empty if the men of the future look like him.

Autobiography (1936; 1949; 1958)
Context: What the mysterious is I do not know. I do not call it God because God has come to mean much that I do not believe in. I find myself incapable of thinking of a deity or of any unknown supreme power in anthropomorphic terms, and the fact that many people think so is continually a source of surprise to me. Any idea of a personal God seems very odd to me.
Intellectually, I can appreciate to some extent the conception of monism, and I have been attracted towards the Advaita (non-dualist) philosophy of the Vedanta, though I do not presume to understand it in all its depth and intricacy, and I realise that merely an intellectual appreciation of such matters does not carry one far. <!-- p. 16 (1946)