A quote
Sextius believed that man had enough sustenance without resorting to blood, and that a habit of cruelty is formed whenever butchery is practised for pleasure. Moreover, he thought we should curtail the sources of our luxury; he argued that a varied diet was contrary to the laws of health, and was unsuited to our constitutions.
Seneca·Letter 108 — On the Approaches to Philosophy (§18)·trans. Gummere