Towards the end of the play, Macbeth's attitude and personality filled with agony and power is clearly observed and understood by readers. He is inside the castle where he challenges Macduff to fight him.
Step-by-step explanation:
Macbeth's thinking that the prophecy may be proven true and that he will not be killed by anyone, made him feel most powerful and strong. He gets inside the castle in front of Macduff and provokes him to fight. Macduff explains to him that the prophecy cannot be true or cannot happen in reality as his mother had a cesarean while giving birth to him.
Macbeth's actions, completely inhumane towards the end of the story reveal how an evil personified attitude has filled in him all through the play after listening to the witches' prophecy. His heroic character comes to end when he is defeated by Macduff after ignoring the fact that was told by him.
He realizes that his end has come and penultimate has become true. Macduff calls him a 'coward' in the end as he never really fought rightfully.