In Bunyan's Pilgrim's Progress you may recall the description of the Man with the Muck Rake, the man who could look no way but downward, with the muck rake in his hand; who was offered a celestial crown for his muck rake, but who would neither look up nor regard the crown he was offered, but continued to rake to himself the filth of the floor.

In Pilgrim's Progress the Man with the Muck Rake is set forth as the example of him whose vision is fixed on carnal instead of spiritual things.  Yet he also typifies the man who in this life consistently refuses to see aught that is lofty, and fixes his eyes with solemn intentness only on that which is vile and debasing.