If the world exists not chiefly that we may love God but that God may love us, yet that very fact, on a deeper level, is so for our sakes. If He who in Himself can lack nothing chooses to need us, it is because we need to be needed. Before and behind all the relations of God to man, as we now learn them from Christianity, yawns the abyss of a Divine act of pure giving—the election of man, from nonentity, to be the beloved of God, and therefore (in some sense) the needed and desired of God, who but for that act needs and desires nothing, since He eternally has, and is, all goodness.
And that act is for our sakes. It is good for us to know love; and best for us to know the love of the best object, God. But to know it as a love in which we were primarily the wooers and God the wooed, in which we sought and He was found, in which His conformity to our needs, not ours to His, came first, would be to know it in a form false to the very nature of things.
For we are only creatures: our role must always be that of patient to agent, female to male, mirror to light, echo to voice. Our highest activity must be response, not initiative. To experience the love of God in a true, and not an illusory form, is therefore to experience it as our surrender to His demand, our conformity to His desire: to experience it in the opposite way is, as it were, a solecism against the grammar of being.
From The Problem of Pain by C S Lewis