One mustn't allow acting to be like stockbroker -- you must...

One mustn't allow acting to be like stockbroker -- you must not take it just as a means of earning a living, to go down every day to do a job of work. The big thing is to combine punctuality, efficiency, good nature, obedience, intelligence, and concentration with an unawareness of what is going to happen next, thus keeping yourself available for excitement.