There is no coming to consciousness without pain. People will do anything, no matter how absurd, in order to avoid facing their own soul. One does not become enlightened by imagining figures of light, but by making the darkness conscious -Carl Jung.
Before Macbeth found out about his future, he just let fate control his life and wasn't really bothered by it. However, once Macbeth found out that his fate was to become the king, he took the situation directed it to the fate he was told about.