C.S. Lewis, Mere Christianity

"If a thing is free to be good it is 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 must be free."

"I do not believe one can settle how much we ought to give. I am afraid the only safe rule is to give more than we can spare. In other words, if our expenditure on comforts, luxuries, amusements, etc, is up to the standard common among those with the same income as our own, we are probably giving away too little. If our charities do not at all pinch or hamper us, I should say they are too small. There ought to be things we should like to do and cannot do because our charitable expenditure excludes them."

"Good and evil both increase at compound interest. That is why the little decisions you and I make every day are of such infinite importance. The smallest good act today is the capture of a strategic point from which, a few months later, you may be able to go on to victories you never dreamed of. An apparently trivial indulgence in lust or anger today is the loss of a ridge or railway line or bridgehead from which the enemy may launch an attack otherwise impossible."

"I do not know why there is this difference, but I am sure that God keeps no one waiting unless He sees that it is good for him to wait. When you do enter your room, you will find that the long wait has done you some kind of good which you would not have had otherwise. But you must regard it as waiting, not as camping. You must keep on praying for light: and of course, even in the hall, you must begin trying to obey the rules which are common to the whole house. And above all you must be asking which door is the true one; not which pleases you best by its paint and paneling."

"[The devil] always sends errors into the world in pairs--pairs of opposites. And he always encourages us to spend a lot of time thinking which is the worse. You see why, of course? He relies on your extra dislike of the one error to draw you gradually into the opposite one."

"Only those who try to resist temptation know how strong it is. ... We never find out the strength of the evil impulse inside us until we try to fight it: and Christ, because He was the only man who never yielded to temptation, is also the only man who knows to the full what temptation means—the only complete realist."

"Progress means getting nearer to the place you want to be. And if you have taken a wrong turning, then to go forward does not get you any nearer. If you are on the wrong road, progress means doing an about-turn and walking back to the right road; and in that case the man who turns back soonest is the most progressive man."

"Good and evil both increase at compound interest."

"In the same way a Christian is not a man who never goes wrong, but a man is enabled to repent and pick himself up and begin over again after each stumble--because the Christ-life is inside him, repairing him all the time, enabling him to repeat (in some degree) the kind of voluntary death which Christ Himself carried out." - Mere Christianity"

"Love is the great conqueror of lust."

"Pride gets no pleasure out of having something, only out of having more of it than the next man... It is the comparison that makes you proud: the pleasure of being above the rest. Once the element of competition is gone, pride is gone."

"Do not imagine that if you meet a really humble man he will be what most people call 'humble' nowadays: he will not be a sort of greasy, smarmy person, who is always telling you that, of course, he is nobody. Probably all you will think about him is that he seemed a cheerful, intelligent chap who took a real interest in what you said to him. If you do dislike him it will be because you feel a little envious of anyone who seems to enjoy life so easily. He will not be thinking about humility: he will not be thinking about himself at all."

"As long as you are proud you cannot know God. A proud man is always looking down on thing and people: and, of course, as long as you are looking down you cannot see something that is above you."

"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."

"Really great moral teachers never do introduce new moralities: it is quacks and cranks who do that... The real job of every moral teacher is to keep on bringing us back, time after time, to the old simple principles which we are all so anxious not to see; like bringing a horse back and back to the fence it has refused to jump or bringing a child back and back to the bit in its lesson that it wants to shirk."

"When the most important things in our life happen we quite often do not know, at the moment, what is going on. A man does not always say to himself, "hullo! i'm growing up." It is only when he looks back that he realises what has happened and recognises it as what people call "growing up."

"When a man is getting worse, he understands his own badness less and less."

"Nobody can always have devout feelings: and even if we could, feelings are not what God principally cares about."

"Everyone reads, everyone hears things discussed. Consequently, if you do not listen to Theology, that will not mean that you have no ideas about God. It will mean that you have a lot of wrong ones--bad, muddled, out-of-date ideas."

"When a man is getting better, he understands more and more clearly the evil that is still left in him."