De Plantatione

But the reason of foolish men is relaxed so as to get strength for many sins; while that of those inclined to be sensible is relaxed, so as to enjoy freedom from care, and cheerfulness, and lightness of heart. For the wise man, when he is intoxicated, becomes more good-humoured than when he is sober; so that in this respect we should not be at all wrong in saying that he may get drunk.

And besides all this, we must likewise add, that we are not speaking of a stern-looking and sordid kind of wisdom, contracted by profound thought and ill-humour; but, on the other hand, of that wisdom which wears a tranquil and cheerful appearance, being full of joy and happiness, by which men have often been led on to sport and divert themselves in no inelegant manner, indulging in amusements suitable to their dignified and earnest character, just as in a well-tuned lyre one may have a combination uniting, by means of opposite sounds, in one melodious harmony.