From "The Misanthrope"

ALCESTE: Sir, these are delicate matters; we all desire
To be told that we've the true poetic fire.
But once, to one whose name I shall not mention,
I said, regarding some verse of his invention,
That gentlemen should rigorously control
That itch to write which often afflicts the soul;
That one should curb the heady inclination
To publicize one's little avocation;
And that in showing off one's works of art
One often plays a very clownish part. ...
You're under no necessity to compose;
Why you should wish to publish, heaven knows.
There's no excuse for printing tedious rot
Unless one writes for bread, as you do not.
Resist temptation, then, I beg of you;
Conceal your pastimes from the public view.

from "The Misanthrope", by Moliere (1666)
Translated by Richard Wilbur (1965).