In Shakespeare's "Hamlet," the phrase highlights the contrast between physical confinement and the vastness of the mind. The speaker suggests that even when restricted, one can attain a sense of freedom and power through thought and imagination. This idea emphasizes the boundless nature of consciousness that allows individuals to perceive themselves as rulers of their own perspectives, regardless of their circumstances.

This quote underscores the theme of existential reflection within the play. It encapsulates the struggle of characters like Hamlet, who experience feelings of entrapment but seek to explore the limitless possibilities of thought. Ultimately, the passage reveals a profound philosophical insight about the nature of reality and self-perception, illustrating how the mind can transcend physical limitations.