Likutei Moharan, Part II 26:1/ליקוטי מוהר"ן·תנינא כ״ו:א׳

1A person has to avoid drunkenness and take care not to drink more than he can handle, so as not to become intoxicated. Yet a bit of drink, when called for, is good for expanding one’s daat.

2And know! daat is garbed in the chasadim (benevolences). When a person drinks in measure, commensurate with his ability, his daat expands and his mind is elevated. Then, the chasadim increase tremendously on account of the drinking. This is because when daat is elevated, the chasadim are elevated and increase, because daat is garbed in the chasadim.

3This is the meaning of what the Sages, of blessed memory, taught: “Anyone who can be appeased by his wine possesses the daat of his Creator” (Eruvin 65a). Specifically “appeased”—which is the aspect of chasadim, because the wine causes the chasadim to increase. This is the meaning of “appeased,” that on account of the increase of the chasadim he is appeased and pacified. Although ordinary chasadim would not appease him, and can possibly become rage, the increased chasadim on account of the wine appease him.

4But when someone drinks more than he should and becomes drunk, then, on the contrary, the ferocity of the gevurot increases, creating anger and rage. Occasionally, the gevurot of the Other Side increase, and this can lead to misfortune, etc., God forbid.