When I was a carpenter, I once worked with this Russian lady architect. I would tell her, ‘Look, I’m terribly sorry, but I want to change that a half inch,’ and she would say, ‘No limit for better.’ I think that is a worthy credo. You keep on going until you get it as close to being right as the time and patience of others will allow.

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.

It's always nice to anticipate working in something that you know people will have an appetite for.

It's important not to base your ambition on anybody else's history, but to figure out how best to use your own particular personality and understanding of yourself to help tell other people's stories.

There is no barrier to Indiana Jones growing older. It's not an age-based character. We can't bang him up as much as we used to, maybe. But I guess I can pretend to have the capacity as well as I pretended before.

[After playing Indiana Jones and Han Solo] hero image concerns me a little, though not for my sake. All it means to me is that I have a responsibility not to get caught doing anything terrible and thereby jeopardise my credentials. Not that I do terrible things, like running over dogs or anything like that. It just makes you think twice before you say or do things in public.

Nothing shocks me. I'm a scientist.