Confucius. Book 1, Chapter 14.
Book 1, Hsio R.
The Master said, "He who aims to be a man of complete virtue in his food does not seek to gratify his appetite, nor in his dwelling place does he seek the appliances of ease; he is earnest in what he is doing, and careful in his speech he frequents the company of men of principle that he may be rectified: ‹ such a person may be said indeed to love to learn."
Text source: Lun Yu, The Confucian Analects. Translated by James Legge.