“It's a terrible thing to have to wake four people, all older than yourself and all very tired, for the purpose of telling them something they probably won't believe and making them do something they certainly won't like.”

“The Moral Law isn't any one instinct or any set of instincts: it is something which makes a kind of tune (the tune we call goodness or right conduct) by directing the instincts. (...) The most dangerous thing you can do is to take any one impulse of your own nature and set it up as the thing you ought to follow at all costs. There's not one of them which won't make us into devils if we set it up as an absolute guide. You might think love of humanity in general was safe, but it isn't. If you leave out justice you'll find yourself breaking agreements and faking evidence in trials 'for the sake of humanity,' and become in the end a cruel and treacherous man.”

“Don't be scared by the word authority. Believing things on authority only means believing them because you've been told them by someone you think trustworthy. Ninety-nine per cent of the things you believe are believed on authority. I believe there is such a place as New York. I haven't seen it myself. I couldn't prove by abstract reasoning that there must be such a place. I believe it because reliable people have told me so. The ordinary man believes in the Solar System, atoms, evolution, and the circulation of the blood on authority -because the scientists say so. Every historical statement in the world is believed on authority. None of us has seen the Norman Conquest or the defeat of the Armada. None of us could prove them by pure logic as you prove a thing in mathematics. We believe them simply because people who did see them have left writings that tell us about them: in fact, on authority. A man who jibbed at authority in other things as some people do in religion would have to be content to know nothing all his life.”

“Science works by experiments. It watches how things behave. Every scientific statement in the long run, however complicated it looks, really means something like, 'I pointed the telescope to such and such a part of the sky at 2:20 a.m. on January 15th and saw so-and-so,' or, 'I put some of this stuff in a pot and heated it to such-and-such a temperature and it did so-and-so.' Do not think I am saying anything against science: I am only saying what its job is.And the more scientific a man is, the more (I believe) he would agree with me that this is the job of science--and a very useful and necessary job it is too. But why anything comes to be there at all, and whether there is anything behind the things science observes--something of a different kind--this is not a scientific question. If there is 'Something Behind,' then either it will have to remain altogether unknown to men or else make itself known in some different way. The statement that there is any such thing, and the statement that there is no such thing, are neither of them statements that science can make. And real scientists do not usually make them. It is usually the journalists and popular novelists who have picked up a few odds and ends of half-baked science from textbooks who go in for them. After all, it is really a matter of common sense. Supposing science ever became complete so that it knew every single thing in the whole universe. Is it not plain that the questions, 'Why is there a universe?' 'Why does it go on as it does?' 'Has it any meaning?' would remain just as they were?”

“The moment you have a self at all, there is a possibility of putting yourself first - wanting to be the centre - wanting to be God, in fact. That was the sin of Satan: and that was the sin he taught the human race. Some people think the fall of man had something to do with sex, but that is a mistake...what Satan put into the heads of our remote ancestors was the idea that they 'could be like Gods' - could set up on their own as if they had created themselves - be their own masters - invent some sort of happiness for themselves outside God, apart from God. And out of that hopeless attempt has come...the long terrible story of man trying to find something other than God which will make him happy.”

“All that we call human history--money, poverty, ambition, war, prostitution, classes, empires, slavery--[is] the long terrible story of man trying to find something other than God which will make him happy.”

“Now that I am a Christian I do have moods in which the whole thing looks very improbable: but when I was an atheist I had moods in which Christianity looked terribly probable.”