"You have to have some psychological insight, you have to know the people and you must work in a way that’s acceptable to them. There you must smile — never laugh, because that’s considered making fun. Smile, take your time, and never come bursting in with your own personality. You have to lie low. Of course you can push and perhaps raise your voice a notch, but like a sensitive emulsion, a sensitive plate. Approach gently, tenderly, and never intrude, never push. Otherwise, if you use your elbows, it will work against you. Above all, be human!"