This scene is starting by the return of Macbeth and his loyal friend Banquo from the battle. On their way back, they meet three witches that Banquo named "weird sisters". These three witches tell Macbeth about his destiny as becoming thane of Cawdor and then king. Banquo jealous wants to know more about good news for him but with no chances, Macbeth gets all the news. Avid to know more he asks again the witches. The witches heard the message maybe as an order, and it is known that witches hate to receive orders, so they vanish away and don't answer back. When the witches were gone, Banquo and Macbeth received the news from the King by the arrival of Ross and Angus, other thanes. From them, Macbeth gets to know one of the two premonitions from the witches: he has become thane of Cawdor.
(Note: Here Macbeth is sounds like a great man whom, from news or premonitions of "weird sisters," become avid of power. Now he is looking forward to know if he will or not become or not King).
Scene 4:.
Back in Duncan's palace at Forres, where he is looking forward for Macbeth returns. He wants to know if Macbeth has received his message that he is the new thane of Cawdor. As Duncan said, "There's no art to find the mind's construction in the face. He was a gentleman, on whom I built an absolute trust," it means so much that he would do anything to make Macbeth happy and he would even live his life in the hand of his cousin. So we can see how trusty he is toward Macbeth. Even, when Macbeth enter the castle, he shows his loyalty to his king as a sign of devotion. Duncan then tells Macbeth that he will come to Macbeth's castle to visit him. Macbeth welcomes him and goes away to tell his wife about the good news.
(Note: Here Macbeth shows all his devotion and his loyalty to the king, but does not speak about the premonition of the witches. He also show up aside is desire as he says "Stars, hide your fires, let no light see my black and deep desires," here he decides that he should take care of the prince firstly before looking forward to the king).
