“When I am violently beset with temptations, or cannot rid myself of evil thoughts, [I resolve] to do some Arithmetic, or Geometry, or some other study, which necessarily engages all my thoughts, and unavoidably keeps them from wandering.” - Jonathon Edwards (1703-1758) In T. Mallon A Book of One's Own. Ticknor & Fields, New York, 1984, p. 106-107 - American Congregational clergyman & theologian.