Boleslavsky on the actor

This from Boleslavsky's 1933 book, "The actor is usually word shy and inarticulate.Often he does not know what he does or how he does it, that makes him an actor. Even when he knows it, it is difficult for him to say it or write it. He can only express it in action. His language is a language of movement, of gesture, of voice, of the creation and projection of character by things done or left undone." Ever read a better description of the mindset of an accomplished (multiple modality) language learner?