“A young man who wishes to remain a sound atheist cannot be too careful of his reading.”

“Now, if we are made for heaven, the desire for our proper place will be already in us, but not yet attached to the true object, and will even appear as the rival of that object […] If a transtemporal, transfinite good is our real destiny, then any other good on which our desire fixes must be in some degree fallacious, must bear at best only a symbolical relation to what will truly satisfy.”

“Nothing will shake a man-or at any rate a man like me-out of his merely verbal thinking and his merely notional beliefs. He has to be knocked silly before he comes to his senses. Only torture will bring out the truth. Only under torture does he discover it himself.”

“Since it is so likely that (children) will meet cruel enemies, let them at least have heard of brave knights and heroic courage. Otherwise you are making their destiny not brighter but darker.”

“Do not waste time bothering whether you 'love' your neighbour; act as if you did ... the Christian, trying to treat every one kindly, finds himself liking more and more people as he goes on-including people he could not even have imagined himself liking at the beginning.”

“The typical expression of opening Friendship would be something like, 'What? You too? I thought I was the only one!”

“To love you as I should, I must worship God as Creator. When I have learnt to love God better than my earthly dearest, I shall love my earthly dearest better than I do now. In so far as I learn to love my earthly dearest at the expense of God and instead of God, I shall be moving towards the state in which I shall not love my earthly dearest t all. When first things are put first, second things are not suppressed but increased.”

“How wicked it would be, if we could, to call the dead back! She said not to me but to the chaplain, 'I am at peace with God.' She smiled, but not at me. Poi si torno all' eterna fontana.”

“We may be sure that the characteristic blindness of the twentieth century - the blindness about which posterity will ask, "But how could they have thought that?" - lies where we have never suspected it... None of us can fully escape this blindness, but we shall certainly increase it, and weaken our guard against it, if we read only modern books. Where they are true they will give us truths which we half knew already. Where they are false they will aggravate the error with which we are already dangerously ill. The only palliative is to keep the clean sea breeze of the centuries blowing through our minds, and this can be done only by reading old books.”

“No emotion is, in itself, a judgement; in that sense all emotions and sentiments are alogical. but they can be reasonable or unreasonable as they conform to Reason or fail to conform. The heart never takes the place of the head: but it can, and should, obey it.”

“The promise, made when I am in love and because I am in love, to be true to the beloved as long as I live, commits me to being true even if I cease to be in love. A promise must be about things that I can do, about actions: no one can promise to go on feeling in a certain way. He might as well promise to never have a headache or always to feel hungry.” 

“There is but one good; that is God. Everything else is good when it looks to Him and bad when it turns from Him.”

“You have no idea what an appetite it gives one, being executed.”

“God created things which had free will. That means creatures which can go wrong or right. Some people think they can imagine a creature which was free but had no possibility of going wrong, but I can't. If a thing is free to be good it's also free to be bad. And free will is what has made evil possible. Why, then, did God give them free will? Because free will, though it makes evil possible, is also the only thing that makes possible any love or goodness or joy worth having. A world of automata -of creatures that worked like machines- would hardly be worth creating. The happiness which God designs for His higher creatures is the happiness of being freely, voluntarily united to Him and to each other in an ecstasy of love and delight compared with which the most rapturous love between a man and a woman on this earth is mere milk and water. And for that they've got to be free. Of course God knew what would happen if they used their freedom the wrong way: apparently, He thought it worth the risk. (...) If God thinks this state of war in the universe a price worth paying for free will -that is, for making a real world in which creatures can do real good or harm and something of real importance can happen, instead of a toy world which only moves when He pulls the strings- then we may take it it is worth paying.”

“The sane would do no good if they made themselves mad to help madmen.”