For wine makes people easily slip into rage, and oftentimes freedom of speech in liquor makes enemies.
 Plutarch, Moralia (c. 100 AD). copy citation

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Author Plutarch
Source Moralia
Topic speech freedom
Date c. 100 AD
Language English
Reference
Note Translated by Arthur Richard Shilleto
Weblink http://www.gutenberg.org/files/23639/23639-h/23639-h.htm

Context

“For he disturbs the harmony of a social gathering454 who, in the midst of mirth and jollity, introduces a topic that shall knit the brows and contract the face, and shall act as a damper to the Lysian455 190god, who, as Pindar says, "looses the rope of all our cares and anxieties." There is also great danger in such ill-timed freedom of speech. For wine makes people easily slip into rage, and oftentimes freedom of speech in liquor makes enemies. And generally speaking it is not noble or brave but cowardly to conceal your ideas when people are sober and to give free vent to them at table, snarling like cowardly dogs. We need say no more therefore on this head.” source