Correct me If I am wrong. Are you mentioning this part of the fifth act? In that case I highlight the lines where <span>Macbeth tells the audience that Macbeth realizes his mistake and regrets his ambition. </span> <span>Will chair me ever or disseat me now.
I have liv'd long enough: my way of life
Is fall'n into the sear, the yellow leaf; And that which should accompany old age, As honour, love, obedience, troops of friends,
I must not look to have; but, in their stead,
Curses, not loud but deep, mouth-honour, breath,
Which the poor heart would fain deny, and dare not.</span>
I would say a metaphor because, even though they are very common in all forms of writing, literature, etc. People tend to have a very hard time finding them and identifying them. Some people get metaphors confused with other forms of writing devices.
