Varied desires come with varied knowledge, and the first pleasures we know are the only ones we desire for long enough.
 Jean-Jacques Rousseau, Emile, or On Education (1762). copy citation

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Author Jean-Jacques Rousseau
Source Emile, or On Education
Topic pleasure desire
Date 1762
Language English
Reference
Note Translated by Barbara Foxley
Weblink http://www.gutenberg.org/cache/epub/5427/pg5427-images.html

Context

“I understand how these tastes may be combined, and that at last men find time for both. But the passions of youth cannot be divided in this way. Give the youth a single occupation which he loves, and the rest will soon be forgotten. Varied desires come with varied knowledge, and the first pleasures we know are the only ones we desire for long enough. I would not have the whole of Emile's youth spent in killing creatures, and I do not even profess to justify this cruel passion; it is enough for me that it serves to delay a more dangerous passion, so that he may listen to me calmly when I speak of it, and give me time to describe it without stimulating it.” source