“There are two kinds of people in the world: the kind who alphabetize their record collections, and the kind who don't.”

Vanity Fair (February 1920)
Variant: There may be said to be two classes of people in the world; those who constantly divide the people of the world into two classes, and those who do not.
Context: There may be said to be two classes of people in the world; those who constantly divide the people of the world into two classes, and those who do not. Both classes are extremely unpleasant to meet socially, leaving practically no one in the world whom one cares very much to know.

Source: My Horizontal Life: A Collection of One-Night Stands

Source: Still Life with Woodpecker (1980)

Source: P.S. I Still Love You

Source: Professor Stewart's Cabinet of Mathematical Curiosities

Without Remorse (1993), p. 231
1990s

Source: Darkfever

to an empty chair representing Richard Dawkins, Contending with Christianity's Critics Conference, Watermark Community Church, Dallas,
viewable at [2012-10-09, Eastwooding Richard Dawkins, ReasonableFaithOrg, YouTube, http://www.youtube.com/watch?v=_XZb8m7p8ng, 2012-10-10] Also quoted in [2012-10-09, Christian Apologist ‘Eastwooding’ After Richard Dawkins Refuses Debate, Michael, Gryboski, The Christian Post, http://www.christianpost.com/news/christian-apologist-eastwooding-after-richard-dawkins-refuses-debate-82963/, 2012-10-10]

I'm a Stranger Here Myself (1938), I Have It On Good Authority
Context: There are two kinds of people who blow through life like a breeze,
And one kind is gossipers, and the other kind is gossipees,
And they certainly annoy each other,
But they certainly enjoy each other,
Yes, they pretend to flout each other,
But they couldn't do without each other...