I think the most important thing is the temperament, and basic metabolism of the man.
5 seconds sound clip from The Honeymooners (1955) - Opportunity Knocks, But sitcom.
You can hear this line at 00:12:26.301 in the Blu-ray version of the TV Series.
Quote context
[...]
- It's a relaxing game. I mean, to coin a phrase: a relaxed bus driver is an efficient bus driver.
- Well, that's a very interesting suggestion, Norton.
- I think the most important thing is the temperament, and basic metabolism of the man.
- Well, now, that's very, very interesting. I like a man who can think on his feet.
- Say, Ralph, what do you think of that suggestion?
- Now here's how you stroke, Mr. Marshall.
- You're talking about buses running on a schedule and everything.
[...]