When thou art offended with any man's shameless conduct, immediately ask thyself, Is it possible, then, that shameless men should not be in the world?
 Marcus Aurelius, Meditations (c. 170 - 180). copy citation

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Author Marcus Aurelius
Source Meditations
Topic art world
Date c. 170 - 180
Language English
Reference
Note Translated by George Long
Weblink https://www.gutenberg.org/files/15877/15877-h/15877-h.htm

Context

“for never to desert philosophy in any events that may befall us, nor to hold trifling talks either with an ignorant man or with one unacquainted with nature, is a principle of all schools of philosophy; but to be intent only on that which thou art now doing and on the instrument by which thou doest it. 42. When thou art offended with any man's shameless conduct, immediately ask thyself, Is it possible, then, that shameless men should not be in the world? It is not possible. Do not, then, require what is impossible. For this man also is one of those shameless men who must of necessity be in the world. Let the same considerations be present to thy mind in the case of the knave, and the faithless man, and of every man who does wrong in any way.” source