The play opens with a dark mood and a serious tone made by the weird sisters' tricky speeches, whose prophecies will turn Macbeth into an ambitious person by making him feel invincible. As a curios fact, the word weird comes from old English and means fate or destiny. The instruments of evil often called the three witches by Shakespeare foreshadow Macbeth's future. All words that come out from their mouth act to equivocate and confuse the characters. For example, "Fair is foul, and foul is fair" (ActI.1.10) in which the meaning of what is good is played. Contrasting characters like Macbeth and Macduff and situations like murdering the Thane of Cawdor being fair, repeats itself along the play. Even though killing is wrong, killing the Thane of Cawdor is considered (by the king) to be an action of bravery and honor while we consider...