After doing so many different roles, if you don't stretch yourself, there's no excitement left.
At 24, my head was as shiny as a cue ball on a billiard table. I naturally thought this meant curtains. Actually, I found it helped. When I was too young to play real character parts, they mistook me for older because of the bald noggin. I got juicy roles right from the start.
Our failure to properly deal with Germany and Japan early cost the world dearly later on. We dare not make the same mistake with China.