‘The Devil was sick, the Devil a monk would be.’ as quoted in C.S. Lewis, The Four Loves
“We may give our human loves the unconditional allegiance which we owe only to God. Then they become gods: then they become demons. Then they will destroy us, and also destroy themselves. For natural loves that are allowed to become gods do not remain loves. They are still called so, but can become in fact complicated forms of hatred.” -C.S. Lewis, The Four Loves
“St John’s saying that God is love has long been balanced in my mind against the remark of a modern author (M. Denis de Rougemont) that ‘love ceases to be a demon only when he ceases to be a god’; which of course can be re-stated in the form ‘begins to be a demon the moment he begins to be a god’. This balance seems to me an indispensable safeguard. If we ignore it the truth that God is love may slyly come to mean for us the converse, that love is God.” -C.S. Lewis, The Four Loves
“however initiated and supported by Grace, [it] is something we must do.” -C.S. Lewis, The Four Loves
BTW: This addresses the issue that God enables us to serve him, while also not toning down the fact that we must do it.
See C.S. Lewis The Four Loves, specifically his discussion of “Need-Love” starting at “But thirdly, we come…” in the Introduction.
“a man’s spiritual health is exactly proportional to his love for God.” -C.S. Lewis, The Four Loves
“Where Need-love is felt there may be reasons for denying or totally mortifying it; but not to feel it is in general the mark of the cold egoist. Since we do in reality need one another (‘it is not good for man to be alone’), then the failure of this need to appear as Need-love in consciousness—in other words, the illusory feeling that it is good for us to be alone—is a bad spiritual symptom; just as lack of appetite is a bad medical symptom because men do really need food.” -C.S. Lewis, The Four Loves