I believe in Christianity as I believe the sun has risen, not only because I see it, but because by it I see everything else.

— C. S. Lewis, The Weight of Glory and Other Addresses, 1980, p. 92.

In God you come up against something which is in every respect immeasurably superior to yourself. Unless you know God as that—and, therefore, know yourself as nothing in comparison—you do not know God at all. As long as you are proud you cannot know God. A proud man is always looking down on things and people: and, of course, as long as you are looking down, you cannot see something that is above you.

— C. S. Lewis, Mere Christianity, 2001, p. 124.

Let’s take this question to the cross. Go to the cross and say, “God, why are you allowing evil and suffering to continue?” And, even though the cross cannot tell you what the answer to that question is, the cross can tell you what the answer to that question isn’t—what it can’t be. It can’t be that He doesn’t love us. It can’t be that He doesn’t care. We don’t know what the reason is that He allows evil and suffering, but the one thing that it can’t be is He doesn’t care or He’s remote or He’s indifferent, because He came and He plunged Himself, not just into the fiery furnace of our sufferings, but to infinite degrees beyond anything that we will ever suffer, because He loves us that much and He hates suffering that much that He was willing to come and be plunged into our sufferings and experience it so that some day He could end all evil without ending us.

— Timothy J. Keller, “Suffering: If God Is Good, Why Is There So Much Evil in the World?,” 2006, 17:55.

There are only two kinds of people in the end: those who say to God, “Thy will be done,” and those to whom God says, in the end, “Thy will be done.” All that are in Hell, chose it. Without that self-choice there could be no Hell. No soul that seriously and constantly desires joy will ever miss it. Those who seek find. To those who knock it is opened.

— C. S. Lewis, The Great Divorce, 1946, pp. 72-73.