The quote from Shakespeare's "Measure for Measure" explores the theme of pride and the folly that often accompanies authority. It highlights how individuals, filled with a sense of power and importance, can be oblivious to their own ignorance and shortcomings. The imagery of a “glassy essence” suggests fragility and delusion, as people in positions of authority act with arrogance, likened to the unpredictable antics of an angry ape.

This behavior, as suggested in the quote, is not merely humorous but can evoke pity even from celestial beings, indicating that the self-important actions of mankind could provoke laughter from angels if they were capable of human emotions. Thus, Shakespeare critiques human nature, revealing how those who wield power can often be the least aware of their true selves and the ridiculousness of their actions.