Novels attempt to render human experience; that's really all they are. They are meant to convey empathy for the character.
You learn more discipline in the theatre than you do in movies or TV. You're on stage every night and you have to sustain your energy level tor several hours.
To act with a tennis ball and imagine it's a tentacle, or if you're in some kind of wilderness film and you go, 'Okay, we can't have a grizzly bear here, but imagine when you step over the rock there there's a grizzly bear.' I don't know. They're tough moments.