I do not approve the maxim which desires a man to know a little of everything. Superficial knowledge, knowledge without principles, is almost always useless and sometimes harmful knowledge.
Luc de Clapiers, Marquis de Vauvenargues (1715-1747) French moralist, essayist, soldier
Reflections and Maxims [Réflexions et maximes] (1746) [tr. Lee (1903)]
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superficiality
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For one’s emotional state is always determined by the oddest and most accidental things, and it is precisely the most superficial factors that often fortify or diminish our courage.
Stefan Zweig (1881-1942) Austrian novelist, playwright, journalist, biographer
Beware of Pity (1939)
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