I was trained as a neurologist, and then I went into the theater, and if you're brought up to think of yourself as a biological scientist of some sort, pretty well everything else seems frivolous by comparison.
I became startled by the extraordinary difference between something whose surface is completely invisible which only makes itself present by virtue of what it reflects, and a window, which doesn't make itself apparent at all, in the ideal case.
I spend a lot of my time trying to draw the attention of actors to the minute and subtle details of human behavior, which was the sort of thing I was looking at when I was a neurologist.
What I should have been, you see, is a neurologist.
Being a doctor has taught me a lot about directing. You're doing the same thing: You're reconstructing the manifold of behavior to the point where an audience says, yes, that's exactly like people I know.
You spend ten years of your life being trained to do one thing, and you're being taught to think that it's the most serious thing that anyone could possibly do, and then suddenly you find yourself doing something that in some respects is the epitome of frivolity.