I love actors, both my parents were actors, and the work with actors is the most enjoyable part of making a film. It's important that they feel protected and are confident they won't be betrayed. When you create that atmosphere of trust, it's in the bag - the actors will do everything to satisfy you
That in affairs of very considerable importance men should deal with one another with satisfaction of mind, and mutual confidence, they must receive competent assurances concerning the integrity, fidelity, and constancy each of other.