The Curse of Greyface is one of the most important parts of Discordianism. It features prominently on several pages of the Principia Discordia. According to the Principia, Greyface was a man who lived in the year 1166 BC and taught that life is serious and play is sin. The curse is a psychological and spiritual imbalance that results from these beliefs.
Greyface encouraged his followers to "Look at all the order around you" (Principia Discordia page 00042) and somehow convinced mankind to agree with his ideas about Serious Order. The Principia notes that it is something of a mystery why Greyface gained so many followers when anyone could have looked at all of the disorder in the world.
Greyface and his followers took the game of playing at life more seriously than they took life itself and were known even to destroy other living beings whose ways of life differed from their own.
—Malaclypse the Younger, Principia Discordia, Page 00042
For more details, see also the section "THE CURSE OF GREYFACE AND THE INTRODUCTION OF NEGATIVISM" in the fifth edition of Principia Discordia.
By accepting that life is a serious, orderly matter, the followers of Greyface end up viewing things as either orderly or disorderly. In this system, order is preferred to disorder at all costs. This preference results in both constructive order and destructive order.
The alternative is to view things as either constructive or destructive. In this system, construction is preferred to destruction. Selecting construction results in both constructive order and constructive disorder.
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Wherever they burn books they will also, in the end, burn human beings. ~Heinrich Heine, Almansor, 1823
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