What is the golden key in theater by willam ball?

Before us, there is a chair and in that chair the character we want to represent is sitting before getting in his or her skin we have to try to imagine how this person is. We have to get to know his or her hobbies, mannerisms, language, dreams, passions, smile, language, health. posture, profession, love, name, self-confidence, perceptions, morality, lonelyness, weight, nervous gestures, education, income, temper. birth sign, pride or lack of it, failures, religion, smell. You can add more things when the list is complete you can have an exact idea of the character.