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Phrase(s): A contented mind is a perpetual feast.
Prov. If you are mentally at peace, you will always feel that you have enough of everything, and will not have to strive to get more. • Jill: Lillian doesn’t make very much money, but she seems to be happy all the time. I wonder how she manages that? Jane: A contented mind is a perpetual feast.
McGrawhill's American Idioms And Phrasal Verbs