On Friendship

I have no duty to be anyone's Friend and no man in the world has a duty to be mine. No claims, no shadow of necessity. Friendship is unnecessary, like philosophy, like art, like the universe itself (for God did not need to create). It has no survival value; rather it is one of those things which give value to survival.

...

You will not find the warrior, the poet, the philosopher or the Christian by staring in his eyes as if he were your mistress: better fight beside him, read with him, argue with him, pray with him.

In a perfect Friendship this Appreciative love is, I think, often so great and so firmly based that each member of the circle feels, in his secret heart, humbled before all the rest. Sometimes he wonders what he is doing there among his betters. He is lucky beyond desert to be in such company. Especially when the whole group is together, each bringing out all that is best, wisest, or funniest in all the others. Those are the golden sessions; when four or five of us after a hard day's walking have come to our inn; when our slippers are on, our feet spread out towards the blaze and our drinks at our elbows; when the whole world, and something beyond the world, opens itself to our minds as we talk; and no other has any claim or any responsibility for another, but all are freemen and equals as if we had first met an hour ago, while at the same time an Affection mellowed by the years enfolds us. Life - natural life - has no better gift to give. Who could have deserved it?

C.S. Lewis The Four Loves pg. 70-71