It looks effortless, but it's very complicated to be simple. It's like Clint Eastwood's persona, which is very cool and calm, but there's a lot going on underneath it - there's a lot of passion, and a great deal of understanding of what it is to be human.
Actors like [Clint Eastwood] have a kind of dynamic lethargy: they appear to do nothing, and they do everything. They reduce everything to an absolute minimum. For instance, he had perhaps a four-line speech, and he reduced it to four words.