the source

One lives within a pattern: to ignore this is to take many false directions, but the moment the hidden movement is respected, it becomes the guide, and in retrospect one can trace a clear pattern that continues to unfold . . . The director must have from the start what I have called a "formless hunch," that is to say, a certain powerful yet shadowy intuition that indicates the basic shape, the source from which the play is calling to him. What he needs most to develop in his work is a sense of listening. Day after day, as he intervenes, makes mistakes, or watches what is happening on the surface, inside he must be listening, listening to the secret movements of the hidden process. It is in the name of this listening that he will be constantly dissatisfied, will continue to accept and reject until suddenly his ear hears the secret sound it is expecting and his eye sees the inner form that has been waiting to appear.

-- Peter Brook The Open Door