Read it through once

Twas thus we sought, but sought in vain A panacea for all our pain! Are there not those more vile than we-- If baser mortal man can be! We looked around--and looked again, And searched the world--but searched in vain; For more depraved--more vile than we Sure there were none--none could there be! Alas our souls are steeped in sin! Though clean without--impure within-- As sepulchers adorned with paint A devil within--without a saint!