“Understanding is but the sum of misunderstandings.”

Variant: Love involves a peculiar unfathomable combination of understanding and misunderstanding.

Source: The Bed of Procrustes: Philosophical and Practical Aphorisms (2010), p. 4

Source: The Trial (1920)

Source: The Autobiography of G.K. Chesterton http://books.google.com/books?id=9_m6AAAAIAAJ&q=%22Half+the+trouble+about+the+modern+man+is+that+he+is+educated+to+understand+foreign+languages+and+misunderstand+foreigners%22&pg=PA322#v=onepage (1936)

Minds, Brains and Programs (1980)

1960s, Letter from a Birmingham Jail (1963)
Context: I have almost reached the regrettable conclusion that the Negro's great stumbling block in his stride toward freedom is not the White Citizen's Counciler or the Ku Klux Klanner, but the white moderate, who is more devoted to "order" than to justice; who prefers a negative peace which is the absence of tension to a positive peace which is the presence of justice; who constantly says: "I agree with you in the goal you seek, but I cannot agree with your methods of direct action"; who paternalistically believes he can set the timetable for another man's freedom; who lives by a mythical concept of time and who constantly advises the Negro to wait for a "more convenient season." Shallow understanding from people of good will is more frustrating than absolute misunderstanding from people of ill will. Lukewarm acceptance is much more bewildering than outright rejection.