Paul Newman was a great actor because he never looked like he was acting. Not flashy, not showy...just always professional and very, very good.
If you're not familiar with his body of work, shame on you. Spend the next few Netflix rentals and watch a master at work...
Butch Cassidy & The Sundance Kid
Somebody Up There Likes Me
Cool Hand Luke
To quote Newman as Butch Cassidy..."I've got vision and the rest of the world wears bifocals."
Rest in peace Mr. Newman...you've earned it.