“Your vision will become clear only when you look into your heart. Who looks outside, dreams; who looks inside, awakens.” – Carl Jung ~ This is true but what if you awaken to hell? It is truth that ignorance is bliss.
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.