A desire to utilize knowledge is one thing; the pure desire to know is another.
 Alexis de Tocqueville, Democracy in America (1840). copy citation

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Author Alexis de Tocqueville
Source Democracy in America
Topic desire self-knowledge
Date 1840
Language English
Reference
Note Translated by Henry Reeve
Weblink http://www.gutenberg.org/files/816/816-h/816-h.htm

Context

“Amongst a multitude of men you will find a selfish, mercantile, and trading taste for the discoveries of the mind, which must not be confounded with that disinterested passion which is kindled in the heart of the few. A desire to utilize knowledge is one thing; the pure desire to know is another. I do not doubt that in a few minds and far between, an ardent, inexhaustible love of truth springs up, self-supported, and living in ceaseless fruition without ever attaining the satisfaction which it seeks.” source