what do you learn about Macbeths thoughts and feelings about killing duncan in act 1 scene 7 soliliquy

Act I, Scene 7 is probably the best act and scene of the entire play. It begins with Macbeth convincing himself to not go through with the murderous plan; however, Lady Macbeth's persuasive speech gets him to change his mind again.
Macbeth's soliloquy begins by Macbeth admitting that he is still very tempted to go through with the murder. He would like it to be something that is over and done with quickly and has no potential consequences.

If it were done when ’tis done, then ’twere well
It were done quickly. If the assassination
Could trammel up the consequence, and catch
With his surcease success; that but this blow
Might be the be-all and the end-all here,
But here, upon this bank and shoal of time,
We’d jump the life to come.

Unfortunately, Macbeth knows that there will for sure be consequences. He knows that he risks capture and earthy justice. He also posits that his act of violence isn't teaching good morals. He's worried that more violence might follow because of his actions.


But in these cases
We still have judgment here, that we but teach
Bloody instructions, which, being taught, return
To plague th' inventor: this even-handed justice
Commends the ingredients of our poisoned chalice
To our own lips.



Next, Macbeth lists out a few reasons why he shouldn't go through with the murder. First, Duncan trusts Macbeth as a trustworthy subject of the kingdom. Second, as Duncan's host, Macbeth should be doing everything he possibly can to protect his king. Instead, Macbeth is plotting to kill Duncan. That really bothers Macbeth. Finally, Macbeth admits that Duncan is a good king. People like him. He's fair. He's humble and free of corruption too.



Besides, this Duncan
Hath borne his faculties so meek, hath been
So clear in his great office,



Macbeth ends by admitting that he very much wants to be king; however, he simply can't motivate himself to take an action that is so wrong. The soliloquy shows readers that Macbeth's ambition is great, but his moral conscience is stronger.


I have no spur
To prick the sides of my intent, but only
Vaulting ambition, which o'erleaps itself
And falls on th' other.



Unfortunately, Lady Macbeth walks in 2 seconds later and convinces him otherwise.