Respectfully Quoted: A Dictionary of Quotations. 1989.
Ivan Sergeyevich Turgenev (181883)
To mortify and even to injure an opponent, reproach him with the very defect or vice you feel in yourself.
IVAN TURGENEV, The Rule of Life, Poems in Prose, in his A Reckless Character and Other Stories, trans. Isabel F. Hapgood, p. 317 (1904).
This appeared in Time, March 5, 1951, p. 31, in a different translation: If you desire to put your enemy in the wrong or even to damage his reputation, blame him for the very vice which you feel in yourself.