'Why would a triune God create the world? If he were a uni-personal God, you might says, "Well he created the world so he can have beings who give him worshipful love, and that would give him joy." But the triune God already had that - and he received love within himself in a far purer, more powerful form than human beings can ever give him. So why would he create us? There's only one answer. He must have created us not to get joy but to give it.'
Timothy Keller, King's Cross; The Story of the World in the Life of Jesus, p.9.