"We must not concentrate overmuch upon our feelings. Do not spend too much time feeling your own pulse taking your own spiritual temperature, do not spend too much time analyzing your feelings. That is the high road to morbidity."

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My most persistent memory of stand - up is of my mouth being in the present and my mind being in the future: the mouth speaking the line, the body delivering the gesture, while the mind looks back, observing, analyzing, judging, worrying, and then deciding when and what to say next. Enjoyment while performing was rare - enjoyment would have been an indulgent loss of focus that comedy cannot afford.

— Steve Martin