The theme that is best reflected in these lines is this:
Appearances can be deceptive
<h3>What is the theme in these lines?</h3>
The most apparent theme in these lines is that appearances are often deceptive. We can see here that Lady Macbeth was encouraging her husband to appear genuine when he met the King. Meanwhile, they had the very evil intention and false heart of usurping the throne.
The reader here encounters the theme of appearances vs reality. What the king sees is the opposite of what is apparent to him. They disguise themselves as good whereas their intentions are bad.
Right at the beginning of this excerpt, Edwards states that an extraordinary opportunity, one that you can miss out on, is right in front of you, and then proceeds to explain why the reader has to take this chance while he or she can.