Acting is probably the greatest therapy in the world. You can get a lot stuff out of you on the set so you don't have to take it home with you at night. It's the stuff between the lines, the empty space between those lines which is interesting.
If you're unable to catch it in time, the cancer can spread to the lymph nodes and at that point, the cancer is essentially incurable, but that doesn't mean your condition can't be improved.

