Answer:
Shakespeare develops these themes primarily through Macbeth's internal struggle and moral dilemma, not external conflicts.
The search for knowledge is shown in Macbeth's desire to know the truth of Banquo's prophecy and his sons' fate. He seeks knowledge from the witches to try and gain more power and secure his position, not for its own sake. But their truths are twisted and illusory, fueling Macbeth's overreach for more and more control.
The tension between truth and illusion is central to the play, as Macbeth comes to distrust even those closest to him in his paranoid quest to maintain his power. References to trust and betrayal reflect how lies and deceit undermine the relationships that should be based on truth.
The supernatural elements, like the witches' prophecies, also highlight how truth can be manipulated into illusion or misleading ‘truth’. The prophecies seem to reveal knowledge but ultimately blind Macbeth.
Macbeth's internal conflict and moral struggle primarily develop these themes, not external conflicts with Banquo or issues of trust/betrayal. His ambition, guilt, and descent into tyranny stem from his own tortured over seeking of knowledge and power. The play suggests truth and justice come not from such a fatal flaw but finding the courage to see things as they really are.
So in summary, Shakespeare develops the themes most through Macbeth's own inner turmoil and motives, not the external forces acting upon him. The supernatural elements and prophecies further highlight the tension between truth, knowledge, illusion and deceit at the play's heart. Macbeth's tragic downfall stems from being unable to discern the difference.
Let me know if this helps explain how Shakespeare develops these themes, or if you have any other questions!
Step-by-step explanation: