'It man tries to find everything in a man-woman or a friend-to-friend relationship, he destroys the very thing he wants and destroys the ones he loves. He sucks them dry, he eats them up, and they as well as the relationship are destroyed. But as Christians we do not have to do that. Our sufficiency of relationship is in that which God made it to be, in the infinite persdonal God, on the basis of the work of Christ in communication and love.
The same thing is true for Christian parents and their own children. If we try to find everything in human relationships or if we forget that neither we nor they are perfect, we destroy them. The simple fact is that the bridge is not strong enough. To try to run on the bridge of human relationships that which it cannot bear is to destroy both the relationship and ourselves. But for the Christian, who does not need to have everything in human relationships, human relationships can be beautiful.'
Francis Schaeffer, True Spirituality, p.142.