“Everything is evil. I mean, everything that is, is wicked; every existing thing is an evil; everything exists for a wicked end. Existence is a wickedness and is ordained for wickedness. Evil is the end, the final purpose, of the universe…The only good is nonbeing; the only really good thing is the thing that is not, things that are not things; all things are bad.”

Source: Succubus Shadows

Mountain Interval (1920), 5. In the Home Stretch, Line 187-192
General sources
Context: “My dear,
It’s who first thought the thought. You’re searching, Joe,
For things that don’t exist; I mean beginnings.
Ends and beginnings—there are no such things.
There are only middles.

XII. The origin of evil things; and that there is no positive evil.
On the Gods and the Cosmos

I, 8
The City of God (early 400s)
Context: To the divine providence it has seemed good to prepare in the world to come for the righteous good things, which the unrighteous shall not enjoy; and for the wicked evil things, by which the good shall not be tormented. But as for the good things of this life, and its ills, God has willed that these should be common to both; that we might not too eagerly covet the things which wicked men are seen equally to enjoy, nor shrink with an unseemly fear from the ills which even good men often suffer.
There is, too, a very great difference in the purpose served both by those events which we call adverse and those called prosperous. For the good man is neither uplifted with the good things of time, nor broken by its ills; but the wicked man, because he is corrupted by this world’s happiness, feels himself punished by its unhappiness.

Source: Guide for the Perplexed (c. 1190), Part III, Ch.10

Anathemas and Admirations (1987)

Simple people(who,incidentally,run this socalled world)know this(they know everything)whereas complex people—people who feel something—are very,very ignorant and really don't know anything.
"Foreword to an Exhibit: I" (1944)

Address at the Conference on Cosmic Design, American Association for the Advancement of Science, Washington, D.C. (April 1999)
This comment is modified in a later article derived from these talks:
:Frederick Douglass told in his Narrative how his condition as a slave became worse when his master underwent a religious conversion that allowed him to justify slavery as the punishment of the children of Ham. Mark Twain described his mother as a genuinely good person, whose soft heart pitied even Satan, but who had no doubt about the legitimacy of slavery, because in years of living in antebellum Missouri she had never heard any sermon opposing slavery, but only countless sermons preaching that slavery was God's will. With or without religion, good people can behave well and bad people can do evil; but for good people to do evil — that takes religion.
:* "A Designer Universe?" at PhysLink.com http://www.physlink.com/Education/essay_weinberg.cfm