Yesterday I posted an anecdote by Michael Caine from his 2018 book Blowing the Bloody Doors Off (that title being a reference to a line from the film The Italian Job).
Here are some other quotes by him concerning two sentences which shaped his acting career:
"The first little theatre I was in as a stage actor, I was playing a drunk. We were rehearsing, and a producer said, 'Wait a minute, Michael. What are you doing?' I said, 'Well, I'm a drunk in this scene.' He said, 'No, you're not a proper drunk. A drunk is a man who is trying to speak clearly and walk straight. You are an actor who's trying to mumble and walk crooked.' And the other one, he said to me a little later, I had a scene in a play where I had to cry, and so I was crying. And then again, he stopped me, he said, 'What are you doing?' And I said, 'Well, I'm crying in this scene.' He said, 'You're supposed to be a man crying. When a man cries, he would do anything not to cry. You are an actor who's doing anything to try and cry.' So he taught me movie acting in two sentences.