"Do not put forward anything that you cannot prove by experimentation."

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There has been in our time a lack of reliance on language and a lack of experimentation which are frightening to anyone who sees them as symptoms. We know the phenomenon of stage-fright: it holds the player shivering, incapable of speech or action. Perhaps there is an audience-fright which the play can feel, which leaves him with these incapacities.

— Muriel Rukeyser