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.
Every human love, at its height, has a tendency to claim for itself a divine authority. Its voice tends to sound as if it were the will of God himself. It tells us not to count the cost, it demands of us a total commitment, it attempts to over-ride all other claims and insinuates that any action which is sincerely done “for love’s sake” is thereby lawful and even meritorious.
CS Lewis, The Four Loves