Answer:
Because he was so strict it made it even harder for him to show boo. Since boo is not a real human.
The lines that <span>support the idea that Macbeth does not want to tell his wife about Banquo's murder until after it has been done are the following:
</span><span>A."Be innocent of the knowledge, dearest chuck, / Till thou applaud the deed."
The lines mean - It's better for you not to know about this until you see the results.</span>
