Heaven alone can produce devout people; Princes produce hypocrites.

[Le Ciel seul peut faire les dévots; les Princes font les hypocrites.]

Charles-Lewis de Secondat, Baron de Montesquieu (1689-1755) French political philosopher

Pensées Diverses [Assorted Thoughts], # 630 / 1007 “General Maxims of Politics,” No. 10 (1720-1755) [tr. Clark (2012)]
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In the French, "seul [alone, solely]" is an amendment above the line in manuscript.(Source (French)).