This I learned from her benefactress; from the pious and charitable lady who adopted her in her orphan state, reared her as her own daughter, and whose kindness, whose generosity the unhappy girl repaid by an ingratitude so bad, so dreadful, that at last her excellent patroness was obliged to separate her from her own young ones, fearful lest her vicious example should contaminate their purity: she has sent her here to be healed, even as the Jews of old sent their diseased to the…
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"Boy," Mrs. Amos said, "I am not the least bit surprised at your show of ingratitude.
Christopher Paul Curtis -- Bud, Not Buddy
I remember he used words like ’failure’ and ’ingratitude,’ and once he said very clearly, ’I know how well I have performed my duty.’