“[The decay of Logic results from an] untroubled assumption that the particular is real and the universal is not.” 

“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.”

“When Aslan Bears his teeth winter meets its death. When he shakes his mane, we shall have spring again.”

“The use of fashions in thought is to distract men from their real dangers. We direct the fashionable outcry of each generation against those vices of which it is in the least danger, and fix its approval on the virtue that is nearest the vice which we are trying to make endemic. The game is to have them all running around with fire extinguishers whenever there’s a flood; and all crowding to that side of the boat which is already nearly gone under.”

“Indeed the safest road to Hell is the gradual one--the gentle slope, soft underfoot, without sudden turnings, without milestones, without signposts,...Your affectionate uncle, Screwtape.”

“When once a man is launched on such an adventure as this, he must bid farewell to hopes and fears, otherwise death or deliverance will both come too late to save his honor and his reason. Ho, my beauties!”

“Sleeping on a dragon's hoard with greedy, dragonish thoughts in his heart, he had become a dragon himself.”

“All joy... emphasizes our pilgrim status; always reminds, beckons, awakens desire. Our best havings are wantings.”

“Tea should be taken in solitude.”

“Now is our chance to choose the right side. God is holding back to give us that chance. It won't last forever. We must take it or leave it.

“Pilate was merciful till it became risky.”

“The rule of the universe is that others can do for us what we cannot do for ourselves, and one can paddle every canoe except one's own. ”

“But very quickly they all became grave again: for, as you know, there is a kind of happiness and wonder that makes you serious. It is too good to waste on jokes.”

“Satan always sends error into the world in pairs that are opposites. His great hope is that you will get so upset about one of his errors, that you'll react into the opposite one, and he's got you.”

“But, first, remember, remember, remember the signs. Say them to yourself when you wake in the morning and when you lie down at night, and when you wake in the middle of the night. And whatever strange things may happen to you, let nothing turn your mind from following the signs. And secondly, I give you a warning. Here on the mountain I have spoken to you clearly: I will not often do so down in Narnia. Here on the mountain, the air is clear and your mind is clear; as you drop down into Narnia, the air will thicken. Take great care that it does not confuse your mind. And the signs which you have learned here will not look at all as you expect them to look, when you meet them there. That is why it is so important to know them by heart and pay no attention to appearances. Remember the signs and believe the signs. Nothing else matters.”