Macbeth is determining whether or not to kill King Duncan because to perpetrate this crime is a sin.
If this assassination is to be committed it must be done shortly. It will cost me my afterlife and punish me beyond this life. As well, Duncan has subject me to his honour and has shown humble leadership. Killing him would create a tremendous outrage.
We can no longer go on with this plan. The king has honoured me, and I have earned the good opinion from everyone.
Why did you leave? The king has been calling you.
Were you drunk when you had hope? Will you take the crown you want so badly, or will you live as a coward?
Cease! I only do what is proposed from a man.
Why would you present me with this golden opportunity? If you go on with this plan you will portray yourself as a real man. I would smash the brains of my own child if I had sworn to do so.
We won’t fail. When Duncan is asleep - I’ll get his servants so drunk they won’t recall a single memory. As a result, all suspicions will lead to his drunken servants.
What if we fail -
With that daring spirit of yours you may solely give birth to male children. Once we frame the guards with their bloody daggers people will only see them as the felons.