but man's mind is nurtured by study and meditation; he is always either investigating or doing, and he is captivated by the pleasure of seeing and hearing.
 Marcus Tullius Cicero, On Duties (44 BC). copy citation

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Author Marcus Tullius Cicero
Source On Duties
Topic pleasure mind
Date 44 BC
Language English
Reference
Note Translated by Walter Miller
Weblink http://www.constitution.org/rom/de_officiis.htm

Context

“But it is essential to every inquiry about duty that we keep before our eyes how far superior man is by nature to cattle and other beasts: they have no thought except for sensual pleasure and this they are impelled by every instinct to seek; but man's mind is nurtured by study and meditation; he is always either investigating or doing, and he is captivated by the pleasure of seeing and hearing. Nay, even if a man is more than ordinarily inclined to sensual pleasures, provided, of course, that he be not quite on a level with the beasts of the field (for some people are men only in name,, not in fact)” source