Final answer:
The witches' revelations and 'illusions' greatly impact Macbeth by fueling his ambition, creating a false sense of security, and haunting him with guilt.
Step-by-step explanation:
The witches' revelations and 'illusions' affect Macbeth in several ways. Firstly, their prophecies tap into his ambition and desire for power, fueling his obsession to become king. Secondly, their predictions create a sense of false security and invincibility in Macbeth, leading him to make impulsive and reckless decisions.
Finally, the witches' apparitions and omens serve as a constant reminder of Macbeth's guilt and the consequences of his actions, haunting him throughout the play.