Irish as a person but I feel Jewish as an actor.

When I met scientists, I found them to be as various as any other group of people.

I had no idea what I wanted to do with my life, so nothing of what I was studying seemed to fit. I know now that I should have taken advantage of that time and that I missed a great deal of the opportunity to educate myself.

As a matter of fact, that was a bit of a problem for me at the beginning of my career - the problem of identification. In The Conversation I played a character who was gay, so nobody recognised me from American Graffiti. When I did Apocalypse Now, after Star Wars, I played an intelligence officer of the American army. George Lucas saw the footage I had done and didn't recognise me until halfway through the scene.

I don't take trouble at all to conform a screenplay to my iconography. I don't say, "We can't do that - the audience wouldn't accept it." I try to take the limitations of what is required to play a leading character and then screw with them.

The thing I always guard against when I'm talking to people I'm working with about a script is that there's a thing I don't like and it's called "talk story." It's when you're talking about the story; the characters are tasked with talking about the story instead of allowing the audience to experience the story.

I get mad when people call me an action movie star. Indiana Jones is an adventure film, a comic book, a fantasy.