Let your reclining in bed be for you an image of your declining into your grave—and you will sleep less. Let your refreshment at table be for you a reminder of the grim table of those worms—and you will be less luxurious. And in drinking water, do not forget the thirst of that flame—and you will certainly refuse your nature all it wants.

—St. John Climacus, The Ladder of Divine Ascent