ProverbWisdomEnglish origin

He is not wise that is not wise for himself.

Meaning: Self-interest in practical matters—securing one's own welfare—constitutes genuine wisdom, not abstract knowledge.

Origin: Recorded in A Dictionary of English Proverbs and Proverbial Phrases, an undated collection published in London by Whittaker & Co. around 1880 and credited to Thomas Preston. Its earlier history hasn't been traced.

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