Mastodawn

In civilised life domestic hatred usually expresses itself by saying things which would appear quite harmless on paper (the words are not offensive) but in such a voice, or at such a moment, that they are not far short of a blow in the face.

C. S. Lewis (1898-1963) English writer, literary scholar, lay theologian [Clive Staples Lewis]
The Screwtape Letters, Letter 3 (1942)