• My brother could not write about trifles. Even in society he became animated only when some serious discussion was engaged in, and he complained of feeling 'a dull pain in the brain'--a physical pain, as he used to say--when he was with people who cared only for small talk.

    Peter Kropotkin, Georg Brandes (2009). “Memoirs of a Revolutionist”, p.94, Cosimo, Inc.