C.S. Lewis, Perelandra

I think He made one law of that kind in order that there might be obedience. In all these other matters what you call obeying Him is but doing what seems good in your eyes also. Is love content with that? You do them, indeed, because they are His will, but not only because they are his will. Where can you taste the joy of obeying unless he bids you do something for which His bidding is the only reason?