Though she is quoted as saying this in a 1996 interview, she is also quoted as saying it is a maxim which she follows as a Christian Scientist; it comes from the Christian Science Hymnal, Hymn 249, "O, when we see God's mercy" by Vivian Burnett: "Our gratitude is riches, complaint is poverty."
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It is better to be poor and walk in integrity than to be stupid and speak lies.
If a poor person envies a rich person, he is no better than the rich person.
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Quote text and notes from Wikiquote: Doris Day (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.