Answer:
In the given scene from Shakespeare's "Macbeth," we witness a significant transformation in Macbeth's character and mindset. In Group A, when he first hears the weird sisters' greeting and learns that he is Thane of Glamis, Macbeth expresses surprise but remains somewhat skeptical about becoming Thane of Cawdor. He sees the idea of becoming king as beyond belief and possibility.
However, in Group B, after he learns that he has been named Thane of Cawdor, Macbeth's internal thoughts reveal a profound change within him. He refers to these revelations as "two truths" and sees them as the "happy prologues" to a greater ambition: becoming king. Yet, Macbeth's immediate reaction is not one of unbridled joy but rather a profound inner turmoil. He acknowledges the "horrid image" that this ambition has conjured, causing his hair to stand on end and his heart to race. He recognizes that these ambitions are against the natural order and that the mere thought of murder (presumably to achieve the throne) disturbs him greatly.
This transformation showcases Macbeth's vulnerability, ambition, and the inner conflict that will continue to develop as the play progresses. His initial disbelief transforms into a disturbing realization of the lengths he may have to go to in order to fulfill the prophesied destiny, setting the stage for the tragic events that follow.