More of the best of CS Lewis Quotes
“Safety and happiness can only come from individuals, classes, and nations being honest and fair and kind to each other.”
“The human mind has no more power of inventing a new value than of planting a new sun in the sky or a new primary colour in the spectrum…”
“If naturalism were true then all thoughts whatever would be wholly the result of irrational causes…it cuts its own throat.” (in “A Christian Reply to Professor Price”)
“The essence of religion, in my view, is the thirst for an end higher than natural ends…” (in “A Christian Reply to Professor Price”)
“Every object you see before you at this moment—the walls, ceiling, and furniture, the book, your own washed hands and cut fingernails, bears witness to the colonization of Nature by Reason: for none of this matter would have been in these states if Nature had had her way.”
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“Unless thought is valid we have no reason to believe in the real universe.”
“In the moral sphere, every act of justice or charity involves putting ourselves in the other person’s place and thus transcending our own competitive particularity.”
“If you are really a product of a materialistic universe, how is it that you don’t feel at home there?”
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“No doubt Pain as God’s megaphone is a terrible instrument: it may lead to final and unrepented rebellion. But it gives the only opportunity the bad man can have for amendment. It removes the veil; it plants the flag of truth within the fortress of a rebel soul.” CS Lewis, The Problem of Pain
“Your life is a continuum where wholeness is on one end and destruction is on the other. Each decision you make is moving you one direction towards wholeness and peace with God, or away from Him.” CS Lewis
“Affliction is often that thing which prepares an ordinary person for some sort of an extraordinary destiny.” C.S. Lewis
“The stamp of the Saint is that he can waive his own rights and obey the Lord Jesus.” C.S. Lewis
“It would seem that Our Lord finds our desires not too strong, but too weak. We are half-hearted creatures, fooling about with drink and sex and ambition when infinite joy is offered us, like an ignorant child who wants to go on making mud pies in a slum because he cannot imagine what is meant by the offer of a holiday at the sea. We are far too easily pleased.” C.S. Lewis, The Weight of Glory.
Reading here might be helpful (link)
Compassion in Politics: Christian Social Entrepreneurship, Education Innovation, & Base of the Pyramid/BOP Solutions 
The heart of the quote is the second part, but both sections make the same argument:
” By the goodness of God we mean nowadays almost exclusively His lovingness; and in this we may be right. And by Love, in this context, most of us mean kindness- the desire to see others than the self happy; not happy in this way or in that, but just happy. What would really satisfy us would be a God who said of anything we happened to like doing, ‘what does it matter so long as they are contented?’
We want, in fact, not so much a Father in Heaven as a grandfather in heaven – a senile benevolence who, as they say, ‘liked to see young people enjoying themselves’, and whose plan for the universe was simply that it might be truly said at the end of each day, ‘a good time was had by all’. Not many people, I admit, would formulate a theology in precisely those terms; but a conception not very different lurks at the back of many minds. I do not claim to be an exception: I should very much like to live in a universe which was governed on such lines. But since it is abundantly clear that I don’t, and since I have reason to believe, nevertheless, that God is Love, I conclude that my conception of love needs correction.”
“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 nearly all that we call human history – money, poverty, ambition, war, prostitution, classes, empires, slavery – the long terrible story of man trying to find something other than God which will make him happy.
“The reason why it can never succeed is this. God made us: invented us as a man invents an engine. A car is made to run on petrol, and it would not run properly on anything else. Now God designed the human machine to run on Himself. He Himself is the fuel our spirits were designed to burn, or the food our spirits were designed to feed on. There is no other. That is why it is just no good asking God to make us happy in our own way without bothering about religion. God cannot give us a happiness and peace apart from Himself, because it is not there. There is no such thing.”
And the very last paragraph of his book says this: “Give up yourself and you will find your real self. Lose your life and you will save it. Submit to death, death of your ambitions and favourite wishes every day and death of your whole body in the end submit with every fibre of your being, and you will find eternal life. Keep back nothing. Nothing that you have not given away will be really yours. Nothing in you that has not died will ever be raised from the dead. Look for yourself, and you will find in the long run only hatred, loneliness, despair, rage, ruin, and decay. But look for Christ and you will find Him, and with Him everything else thrown in.”
“It is a profound mistake to imagine that Christianity ever intended to dissipate the bewilderment and even the terror, the sense of our own nothingness, which come upon us when we think about the nature of things.
It comes to intensify them. Without such sensations there is no religion. Many a man, brought up in the glib profession of some shallow form of Christianity, who comes through reading Astronomy to realize for the first time how majestically indifferent most reality is to man, and who perhaps abandons his religion on that account, may at that moment be having his first genuinely religious experience.”
-CS Lewis