After completing an extensive psychological evaluation on Macbeth, I have come to the conclusion that he was a sane man.  Although he may have suffered from post-traumatic stress disorder, his suffering does not constitute insanity.  Macbeth was in a healthy mindset when he embarked on his murderous spree and treacherous rule of Scotland.  His actions and reactions prior to and throughout his tenure as King of Scotland were perfectly normal considering the circumstances.  I hope the following explanations and evidence will prove helpful in your assessment of Macbeth.  

The first thing I would like to point out is Macbeth's clear understanding of his motives and their consequences.  After he heard the prophecies of the weird sisters, his ambition got the best of him.  He immediately considered murdering Duncan and the morality of the murder.  Macbeth knew his...