Which theme from Macbeth do these lines support?
If good, why do I yield to that suggestion
Whose horrid image doth unfix my hair
And make my seated heart knock at my ribs,
Against the use of nature?

Question

Which theme from Macbeth do these lines support? 
If good, why do I yield to that suggestion
Whose horrid image doth unfix my hair
And make my seated heart knock at my ribs,
Against the use of nature?

anonymous · Answer

Darkness is dangerous. 
 Ambition unchecked can lead to corruption. 
 Things are not always what they seem. 
 Those without convictions are easily manipulated.