Here are some of his thoughts:
- "Nothing is less like a friendship than a love-affair. Lovers are always talking to each other about their love; Friends hardly ever about their Friendship. Lovers are normally face to face, absorbed in each other; Friends side by side, absorbed in some common interest. Above all, Eros (while it lasts) is between two only. But two, far from being the necessary number for Friendship, is not even the best."
- "Friendship arises out of mere Companionship when two or more of the companions discover that they have in common some insight or even taste which the others do not share and which, till that moment, each believed to be his own unique treasure (or burden)."
- "The companionship on which Friendship supervenes will not often be a bodily one like hunting or fighting. It may be a common religion, common studies, a common profession, even a common recreation. All who share it will be our companions; but one or two or three who share something more will be our Friends.
"In this kind of love, as Emerson said, Do you love me? means Do you see the same truth? - Or at least, 'Do you care about the same truth?' The man who agrees with us that some question, little regarded by others, is of great importance can be our Friend. He need not agree with us about the answer." - "That is why those pathetic people who simply 'want friends' can never make any. The very condition of having Friends is that we should want something else besides Friends. Where the truthful answer to the question Do you see the same truth? would be 'I see nothing and I don't care about the truth; I only want a Friend,' no Friendship can arise - though Affection, of course, may. There would be nothing for the Friendship to be about; and friendship must be about something."
- "A Friend will, to be sure, prove himself to be also an ally when alliance becomes necessary; will lend or give when we are in need, nurse us in sickness, stand up for us among our enemies, do what he can for our widows and orphans. But such good offices are not the stuff of Friendship. The occasions for them are almost interruptions. They are in one way relevant to it, in another not. Relevant, because you would be a false friend if you would not do them when the need arose; irrelevant, because the role of benefactor always remains accidental, even a little alien to that of Friend.
"It is almost embarrassing. For Friendship is utterly free from Affection's need to be needed. We are sorry that any gift or loan or night-watching should have been necessary - and now, for heaven's sake, let us forget all about it and go back to the things we really want to do or talk of together. Even gratitude is no enrichment to this love. The stereotyped 'Don't mention it' here expresses what we really feel.
"The mark of perfect Friendship is not that help will be given when the pinch comes (of course it will) but that, having been given, it makes no difference at all. It was a distraction, an anomaly. It was a horrible waste of the time, always too short, that we had together. Perhaps we had only a couple of hours in which to talk and, God bless us, twenty minutes of it had to be devoted to affairs!" - "In most societies at most periods Friendships will be between men and men and women and women. The sexes will have met one another in Affection and in Eros but not in this love. For they will seldom have had with each other the companionship in common activities which is the matrix of Friendship. Where men are educated and women are not, where one sex works and the other is idle, or where they do totally different work, they will usually have nothing to be Friends about."
- "When the two people who thus discover that they are on the same secret road are of different sexes, the friendship which arises between them will very easily pass - may pass in the first half hour - into erotic love. Indeed, unless they are physically repulsive to each other, or unless one or both already loves elsewhere, it is almost certain to do so sooner or later."
Lewis is famous for his trenchant insights into human nature. His insights into friendship do nothing to diminish that reputation.
