Never lose yourself on the stage. Always act in your own person, as an artist. The moment you lose yourself on the stage marks the departure from truly living your part and the beginning of exaggerated false acting. Therefore, no matter how much you act, how many parts you take, you should never allow yourself any exception to the rule of using your own feelings. To break that rule is the equivalent of killing the person you are portraying, because you deprive him of a palpitating, living, human soul, which is the real source of life for a part.
Constantin StanislavskiIn the given circumstances you must be rooted in the play. Do not depart from the play. Don't cut yourself off from your partner in the scene, or partners.
Constantin StanislavskiIn the creative process there is the father, the author of the play; the mother, the actor pregnant with the part; and the child, the role to be born.
Constantin StanislavskiWhen you're playing a character who's cruel, look for the places where he's kind. When you're playing a character who is unhappy, look for the places where he has a glint of merriment.
Constantin Stanislavski