I love my wife but sometimes not so much. Frustration and fights can muck up a good thing. And just when a thing can move past differences and into the realm of peace and prosperity, another thing - an old idea or new interpretation or any spark that relights the paradigms that comfort us - will keep us where we are, where it is safe.

I was doing a play out in L.A. 20-some-odd years ago called 'Goose and Tomtom' by David Rabe, and somebody saw it and the next thing I know I'm doing the table read of the film version of 'Glengarry Glen Ross' with Al Pacino and Jack Lemmon - one of the great films of our generation.

You had actors that came from live theatre and it felt like you're doing a play. Every time we did a three or four minute walk-and-talk in the West Wing, the exhilaration of going on stage would be a part of it.

Listen - I like musicals. Even when they're bad, there's a couple of dancers I can watch.

Surviving the grind of 18-hour days and getting up at four in the morning to work out for an hour so I'd have the energy to do it again the next day. I did not know I had that discipline. I did not know I had the discipline to learn a seven-page scene in three hours to shoot that day or the next day. I didn't know that I was capable of realizing that potential.

I had been used to improvising and even in the audition I was feeling free to rearrange Aaron Sorkin words a little bit, as lovely as they were. I didn't find out until after I got the part how furious Aaron was at me for doing that. They said, "He was livid. He did everything in his power not to jump down your throat!" But I came to realise that Aaron was writing in metre and the rhythm of the language is very important.

I love my wife but sometimes not so much. Frustration and fights can muck up a good thing. And just when a thing can move past differences and into the realm of peace and prosperity, another thing - an old idea or new interpretation or any spark that relights the paradigms that comfort us - will keep us where we are, where it is safe.