If you're lucky as you get older, you respect the craft and it becomes a skill.
The only thing you have then to believe in is your craft.
I watch actors destroy themselves by trying to get it right.
There is no right in acting.
When I closed in "King Lear" I went into a period of depression for about three weeks, and every actor I've talked to who's ever played a major, major Shakespeare role has done this.
I just always thought, I love acting and I love writing. And when I haven't got any more good breath and good energy, then I'll write.