I agree with the above post. Macbeth is definitely torn between what is right and wrong with the killing of King Duncan. In fact, Macbeth has even changed his mind about killing King Duncan. He shares with Lady Macbeth his sentiments, stating that they will not proceed with the murder:
We will proceed no further in this business.
He has recently honored me, and I now have the
Golden opinions from all sorts of people,
Which I want to enjoy for a bit longer, and
Not cast them aside so soon.
Macbeth seems content to be honored as Thane of Cawdor. He expresses his decision to not kill King Duncan to Lady Macbeth, declaring that the two of them will not proceed any further in the murdering of King Duncan. He is content with the honors that King Duncan has bestowed upon him.
At this point, Macbeth has clearly changed his mind about murdering King Duncan. Then Lady Macbeth begins challenging his manhood. She manipulates his feelings by asking him if he is afraid to kill Duncan:
Are you afraid
To be the same man in reality
As the one you wish to be? Would you have the crown
Which you believe to be the ornament of life,
And yet live like a coward in your own self-esteem,
Lady Macbeth pressures Macbeth. She will not take no for an answer. She begins playing with Macbeth's emotions. She causes Macbeth to begin thinking about murdering King Duncan. Of course, he has his doubts still and questions the actual killing of King Duncan:
If we should fail?
Once again, Macbeth is contemplating the murder of King Duncan. However, he is uncertain that the action will be completed without failing somehow. To answer his question of failing, Lady Macbeth has the answer:
Only dig deep for your courage,
And we'll not fail.
Macbeth is now thinking about proceeding with the murder of King Duncan. Lady Macbeth has clearly convinced him to proceed. He gives in to her and commits to the murdering of King Duncan:
I’m convinced, and I commit
Every part of my body to this terrible event.
Now, Macbeth is convinced. Lady Macbeth has worked on his emotions and his reasoning. He is now convinced to follow through with the murdering Of King Duncan. Lady Macbeth has won him over with her mainpulation of his manhood.
macbeth was in a dilema whether he would kill duncan or not ,but at the same time he was thinking about the words of the witches.He was also thinking about lady macbeth who was eagerly waiting for him to get the good news about the of death of Duncan.The loyalness towards the king was also obstracting him to kill him.At the same time he could not also control his desire to be the king,All these thoughts were coming to his mind,but at last he decided to kill Duncan.