"My thought, whose murder yet is but fantastical,Shakes so my single state of man that functionIs smother'd in surmise, and nothing is But what is not." (I.III.9).
As the play gradually progresses the audience is led to foresee an insight on Macbeth’s dramatically changing thoughts; through his consistent asides and soliloquies, it has been made clear to the audience that the only factor in which Macbeth lacks, is self-belief. This virtue of being wise and knowledgeable, predominantly accounts for the distorted perception in which Macbeth is having upon his ambition for power.
Jeremy Kassissieh