From C.S. Lewis

The problem of reconciling human suffering with the existence of a God who loves, is only insoluble so long as we attach a trivial meaning to the word ‘love’, and look on things as if man were the centre of them. Man is not the centre. God does not exist for the sake of man. Man does not exist for his own sake. ‘Thou hast created all things, and for thy pleasure they are and were created’ (Revelation 4:11). We were made not primarily that we may love God (though we were made for that too) but that God may love us, that we may become objects in which the Divine love may rest ‘well pleased’. To ask that God’s love should be content with us as we are is to ask that God should cease to be God: because He is what He is, His love must, in the nature of things, be impeded and repelled, by certain stains in our present character, and because He already loves us He must labour to make us lovable. We cannot even wish, in our better moments, that He could reconcile Himself to our present impurities—no more than the beggar maid could wish that King Cophetua should be content with her rags and dirt, or a dog, once having learned to love man, could wish that man were such as to tolerate in his house the snapping, verminous, polluting creature of the wild pack. What we would here and now call our ‘happiness’ is not the end God chiefly has in view: but when we are such as He can love without impediment, we shall in fact be happy.

From The Problem of Pain by C.S. Lewis