Party is the madness of many, for the gain of a few.
Source, in full
From Roscoe's edition of Pope, vol. v. p. 376; originally printed in Motte's Miscellanies (1727). In the edition of 1736 Pope says, "I must own that the prose part (the Thought on Various Subjects), at the end of the second volume, was wholly mine. January, 1734".