To be resident but alien is a formula for loneliness that few of us can sustain. Indeed, it is almost impossible to minister alone because our loneliness can too quickly turn into self-rightness or self-hate. Christians can survive only by supporting one another through the countless small acts through which we tell one another we are not alone, that God is with us. Friendship is not, therefore, accidental to the Christian life.
Resident Aliens pg. 12-13.