day 1; 11/04/18; quote 3
(i'm not as strong on macbeth so apologies if this is subpar!)
"i am afraid to think what i have done"
this shows the consequences of acting with your 'hand' instead of your heart, despite this being said prior to macbeth making the statement that he will no longer let his heart control him. he doesn't want to dwell on the consequences of the murderous crime he committed, thus we can see him as a weak character and one who refuses to take responsibility for his actions, or perhaps the impact of having a guilty conscience.
perhaps we could also link this to the great chain of being- he has just committed regicide, thus disrupting this order that audience believed at the time to be one chosen and set out by god for a reason- the king was also significant. macbeth may be terrified of what he's done knowing he's destroyed something that was once in order. as that's destroyed, he also breaks down as a character. perhaps this could serve as a warning to the audience that this chain should not be tampered with at all.