With any part you play, there is a certain amount of yourself in it. There has to be, otherwise it's just not acting. It's lying.
“Love has its place, as does hate. Peace has its place, as does war. Mercy has its place, as do cruelty and revenge.”
“Nine-tenths of tactics are certain, and taught in books: but the irrational tenth is like the kingfisher flashing across the pool, and that is the test of generals.”