“What is the secular basis of Judaism? Practical need, self-interest. What is the worldly religion of the Jew? Huckstering.”
What is his worldly God? Money.
On the Jewish Question (1843)
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Karl Marx 290
German philosopher, economist, sociologist, journalist and … 1818–1883Related quotes
Source: The invisible religion, 1967, p. 40

As quoted by Rachel Makabi, 'A Race Against Time' http://www.rezapahlavi.org/details_article.php?article=34&page=5, Newsweek International, Sept 4, 2006.
Interviews, 2006
non-jews
14 August 2018 https://twitter.com/MarkSchultzy/status/1029608548731244544
Introduction: an evolutionary riddle, p. 17
In Gods We Trust: The Evolutionary Landscape of Religion (2002)

“Self-interest is a necessary but hardly a sufficient basis for a decent society.”
Source: The Three Questions - Prosperity and the Public Good (1998), Chapter Four, Self-Interest and the Public Interest: Taxes, Debts, and Deficits, p. 86