When passion, or self-interest, or age dims that spark of unquestioning fealty that gleams in a young man's eyes, a woman feels a certain mistrust of him, and begins to observe him critically.
 Honoré de Balzac, Lost Illusions (1843). copy citation

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Author Honoré de Balzac
Source Lost Illusions
Topic age passion
Date 1843
Language English
Reference
Note Translated by Ellen Marriage
Weblink https://www.gutenberg.org/cache/epub/13159/pg13159.html

Context

“She saw in the magistrate's face an expression which, since her marriage, she had seen in no eyes but Kolb's; and for a beautiful woman like Eve, this expression is the criterion by which men are judged. When passion, or self-interest, or age dims that spark of unquestioning fealty that gleams in a young man's eyes, a woman feels a certain mistrust of him, and begins to observe him critically. The Cointets, Cerizet, and Petit-Claud—all the men whom Eve felt instinctively to be her enemies—had turned hard, indifferent eyes on her; with the deputy-magistrate, therefore, she felt at ease, although, in spite of his kindly courtesy, he swept all her hopes away by his first words.” source