Macbeth - Fair is foul and foul is fair

The motif 'fair is foul and foul is fair' runs throughout Act one. Introduced in the beginning of act one by the three weird sisters, it is portrayed through the character, Macbeth. Macbeth holds a positive image in many people's view. Duncan says of Macbeth 'O Valiant cousin! Worthy gentleman!' Receiving the title 'Thane of Cawdor', and fulfilling the first part of the prophesy Duncan claims 'What he hath lost, noble Macbeth had won.' Trusting Macbeth all the while, Duncan never see's Macbeth's true thoughts and desires. He appears trustworthy, when at heart he crafts evil plans, 'Let not light see my black and deep desires!'. The motif is relevant throughout Act one as this axiom is portrayed in Macbeth.