Don't play the result. Act as if.

"You know, there's a rule in acting called 'Don't play the result.' If you have a character who's going to end up in a certain place, don't play that until you get there. Play each scene and each beat as it comes. And that's what you do in your life: You don't play the result. So you get diagnosed with Parkinson's, and you can play the result. You can go right to, 'Oh, I'm sick.' It took me seven years to figure out that I'm not at the result. I'm not at the result till the end. So let's not play it. It's not written yet. And so that's the attitude I take in life. Another expression is 'Act as if. Act as if it's the way you want it to be, and it'll eventually morph into that."

Michael J. Fox