God can no more than an earthly parent be content to have only children: he must have sons and daughters — children of his soul, of his spirit, of his love — not merely in the sense that he loves them, or even that they love him, but in the sense that they love like he loves. For this he does not adopt them; he dies to give them himself, thereby to his own to his heart; he gives them a birth from above; they are born again out of himself and into himself — for he is the one and the all. His children are not his real, true sons and daughters until they think like him, feel with him, judge as he judges, are at home with him, and without fear before him because he and they mean the same thing, love the same things, seek the same ends. For this we are created; it is the one end of our being, and includes all other ends whatever.

-----George MacDonald, Commenting upon Galatians 4:1-7