Dark fire

This came to mind when writing the post below on abortion as a moral choice. From C.S. Lewis in Screwtape Proposes a Toast:

All said and done, my friends, it will be an ill day for us if what most humans mean by 'religion' ever vanishes from the Earth. It can still send us the truly delicious sins. The fine flower of unholiness can grow only in the close neighborhood of the Holy. Nowhere do we tempt so successfully as on the very steps of the altar.