I have a reverence for medicine because I hero-worshiped my father [a former doctor], and because I admire doctors, I admire study, empiricism and rational thought. I don't study, empiricize or think rationally myself - but I admire it in others.

Clive Dunn, as I understand it, retired to the south of Spain, where he worked extensively in watercolours. I don't own any of Clive Dunn's watercolours. I loved him in 'Dad's Army,' loved him. But not enough to actually seek out his watercolour work.

Success on a cosmic level completely eludes me. I'm deeply suspicious of things being too good. It's part of my superstition, I think, to generate pain in order to give the illusion of gain. I'm not saying I reject success, but honestly, I don't quite know how to deal with it. It's an old feeling: As soon as you have the thing you've been going after all your life, that reasonable degree of security, you start kicking against it, doubting it.

To tell you the truth, the older I get, the less I know. I keep meeting people, both older and younger, who seem to have accrued so much more knowledge or expertise or certainty about who they are and the jobs they do. I just marvel at it.

I never went to drama school, I don't have any certificates saying: 'He's a qualified actor.' But I did think that House was something I didn't have to apologise for. It was something I was really proud of and it was sort of ... whether you liked it or not, it was undeniable.

I think that’s the lesson you learn in life. As you get older you realize you’re never going to grow up and you’re never going to be ready. And you may, as well, do things now, don’t wait

Screenwriting is the most prized of all the cinematic arts. Actually, it isn't, but it should be.