"I knew Philip Seymour Hoffman for several years. We went on vacation together. He produced a play of mine. Before we did Doubt, we worked in the same theater company together, and he was, you know, very committed to excellence. And so he could become impatient with anybody who was not committed to excellence, and that could make him a volatile person to deal with. Phil cared. He cared a great deal. And he worked really hard."