Being a funny person does an awful lot of things to you. You feel that you mustn't get serious with people. They don't expect it from you, and they don't want to see it. You're not entitled to be serious, you're a clown. Fanny Brice
I mean one of the basic rules when you're acting is that you mustn't stand in judgement on a character, you mustn't say Hitler was a bad man because you can't act in that way. Janet Suzman
The songwriter mustn't fall in love with his own song. If it doesn't belong, he can't push it into a show. Let him save it; maybe it'll fit in another show. Dorothy Fields
Think about the photo before and after, never during. The secret is to take your time. You mustn't go too fast. The subject must forget about you. Then, however, you must be very quick. Henri Cartier-Bresson
When you share your last crust of bread with a beggar, you mustn't behave as if you were throwing a bone to a dog. You must give humbly, and thank him for allowing you to have a part in his hunger. Giovanni Guareschi
You sit there waiting for the RED LIGHT to go on. You could be sitting there for five minutes, waiting, while the producer talks to the engineer. Then the light goes on you know that you mustn't make a mistake for at least 4 minutes. Jim Sullivan