When you wrote it didn't matter if hysteria sometimes came up in your face and voice (unless, of course, you let it find its way into your "literary voice") because writing was done in merciful privacy and silence. Even if you were partly out of your mind it might turn out to be all right: you could try for control even harder than Blanche Dubois was said to have tried, and with luck you could still bring off a sense of order and sanity on the page for the reader. Reading, after all, was a thing done in privacy and silence too.