Ingratitude is a very irksome thing, which no human creature can tolerate
 Martin Luther, Table Talk (1566). copy citation

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Author Martin Luther
Source Table Talk
Topic ingratitude
Date 1566
Language English
Reference
Note Translated by William Hazlitt
Weblink http://www.ntslibrary.com/PDF%20Books/Luther%20Table%20Talk.pdf

Context

“But seeing our ship is weak, and the winds and waves beat upon us, as though they would overwhelm us, therefore we have need of a good and experienced pilot, who with his counsel and advice may rule and govern the vessel, that it run not on a rock, or utterly sink and go down. Such a pilot is our blessed Saviour Christ Jesus. DCXCI. Ingratitude is a very irksome thing, which no human creature can tolerate; yet our Lord God can endure it. If I had had to do with the Jews, patience would have failed me; I had never been able so long to endure their stubbornness. The prophets were always poor, condemned people;” source