How does Aeschylus use imagery in Prometheus Bound?

Imagery:

“Your speech is pompous sounding, full of pride, as fits the lackey of the Gods. You are young and young your rule and you think the tower in which you live is free from sorrow: from it have I not seen two tyrants thrown? The third, who now is king, I shall yet live to see him fall, of all three most suddenly, most dishonored. Do you think I will crouch before your Gods, -so new-and tremble? I am far from that.”

“This is a sickness rooted and inherent in the nature of a tyranny: that he that holds it does not trust his friends.”