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As small letters hurt the sight, so do small matters him that is too much intent upon them; they vex and stir up anger, which begets an evil habit in him in reference to greater affairs.

Plutarch (1704). “Plutarch's Morals”, p.58
As small letters hurt the sight, so do small matters him that is too much intent upon them; they vex and stir up anger, which begets an evil habit in him in reference to greater affairs.