“A mistake is always forgivable, rarely excusable, and never acceptable.”

Source: „Man wird uns nie verzeihen, daß wir uns nicht haben erschlagen oder ein bißchen vergasen lassen.“ Christoph Buchwald: Odysseus hat entweder heimzukommen oder umzukommen. Notizen zur Rezeption Walter Mehrings nach 1950, in the quarterly die horen 1982, p. 15 https://books.google.de/books?id=lgpZAAAAMAAJ&q=1948

Source: My Double Life (1907), Ch. 33 <!-- p. 369 -->
Context: Life is short, even for those who live a long time, and we must live for the few who know and appreciate us, who judge and absolve us, and for whom we have the same affection and indulgence. The rest I look upon as a mere crowd, lively or sad, loyal or corrupt, from whom there is nothing to be expected but fleeting emotions, either pleasant or unpleasant, which leave no trace behind them. We ought to hate very rarely, as it is too fatiguing; remain indifferent to a great deal, forgive often and never forget.

Source: Sisterland

Al-Tirmidhi, Hadith 1011
Sunni Hadith

A Factless Autobiography, Richard Zenith Edition, Lisbon, 2006, p 229
The Book of Disquiet
Original: O ter tocado os pés de Cristo não é desculpa para defeitos de pontuação.

Source: Like the Flowing River