A heartening thought for seldom-read scribblers (ahem...), philosophers down on their luck, poets in anguish and writers in woe:
Scythrop did not despair. 'Seven copies', he thought, 'have been sold. Seven is a mystical number, and the omen is good. Let me find the seven purchasers of my seven copies, and they shall be the seven golden candlesticks with which I will illuminate the world'.
The crucial thing, of course, is to reach the magical, though meagre, circulation of seven. And not to overshoot this. An eighth purchaser of any treatise or manifesto can cast the whole world into darkness and DOOM.