Macbeth - Lady Macbeth's influence on the audience and themes

In the play "Macbeth", I think Shakespear, the author, uses characters in the structure of the play to a large effect. In Act1, I think Banquo was used by Shakespear as a contrast to Macbeth; they are close friends, and have similar personalities, but when they are each prophesised great things by the witches, Banqo does not become as amitious as Macbeth does. I think this shows that Lady Macbeth played a large part in …

…privately and kept secrets from his people. Duncan showed that he cared for his people. In Act1 Scene2, Duncan speaks with a wounded sargeant. He talks to him as an equal. The sargeant feels he can talk to Duncan like a friend, for example, he makes a joke: "as sparrows eagles or the hare the lion" when Duncan asks if Macbeth was worried about the battle. Duncan also sends the wounded sargeant for medical attention.