Tim Keller, on Spiritual Friendship:
Adam was not lonely because he was imperfect, but because he was perfect. The ache for friendship is the one longing that is not because of sin…. This is one ache that is part of his perfection… God made us in such a way that we cannot enjoy paradise without friends. God made us in such a way that we cannot enjoy our joy without friends. Human friends. Adam had a perfect quiet time every day, 24 hours, never had a dry one, and yet he needed [friends].
There’s not much written about friendship. A few books here and there, and not much robustly biblical. Surely the echo of this Edenic ache in our souls calls for us to stare this topic right in the eye. And if we want to know what true friendship is all about, Jesus tells us to look at the cross: “greater love has no one than this, that someone lays down his life for his friends” (John 15:13). Considering friendship will take us to the heart of the gospel.