Macbeth's Free Will

In Macbeth, the witches prophecies seem to negate Macbeth’s free will. However, at some instances, Macbeth willfully chooses evil over good. The witches prophesies that Macbeth will be thane of Cawdor and King of Scotland. The idea of being King of Scotland soon comes to rule Macbeth’s thoughts and life. He could just let fate happen, but instead he willingly takes fate into his own hands.
Lady Macbeth talks her husband into killing Duncan, the King of Scotland. Macbeth could have said no, which he did at first, but eventually he g...