"Theology is only thought applied to religion..."

[...] the critic generally begins by dismissing these conflicts with the statement that they are all about small points of theology. I do not admit that theological points are small points. Theology is only thought applied to religion; and those who prefer a thoughtless religion need not be so very disdainful of others with a more rationalistic taste. The old joke that the Greek sects only differed about a single letter is about the lamest and most illogical joke in the world. An atheist and a theist only differ by a single letter; yet theologians are so subtle as to distinguish definitely between the two.

-The New Jerusalem (1920)