You taught me language; and my profit on't Is, I know how to curse.
You taught me language; and what I've gained from it Is that I now know how to curse.
Caliban · Act 1, Scene 2
Caliban speaks this after Prospero has threatened him with torment for his attempted assault on Miranda. The line is unforgettable because it distills the entire colonial encounter in a single bitter paradox—education becomes a tool of oppression, and the gift of speech becomes the ability to articulate rage. It shows us Caliban as neither monster nor servant but as a dispossessed human forced to see his own enslavement through the language his master gave him.
This thing of darkness I Acknowledge mine.
This creature of darkness! Admit that he's mine.
Caliban · Act 5, Scene 1
Prospero speaks this when Caliban is brought before the court at the end, claiming ownership of him as his creation and his crime. The line is unforgettable because it contains the only moment of near-accountability Prospero offers—an admission that Caliban belongs to him, is shaped by him, and is therefore his responsibility. Yet even this acknowledgment is framed as possession, not liberation.
All the infections that the sun sucks up From bogs, fens, flats, on Prosper fall and make him By inch-meal a disease!
All the diseases the sun pulls up From swamps, marshes, and flatlands, fall on Prospero and make him Slowly sick!
Caliban · Act 2, Scene 2
Caliban curses Prospero while carrying wood, knowing the spirits will punish him but unable to stop himself. The line matters because it shows how oppression creates an impossible bind—Caliban must curse even as he serves, must rage even as he obeys. It is the voice of someone whose only freedom is the freedom to wish harm on his oppressor.
Confined together In the same fashion as you gave in charge, Just as you left them; all prisoners, sir, In the line-grove which weather-fends your cell;
They are all together, In the same state you instructed me to put them in, Just as you left them; all prisoners, sir, In the grove that protects your cell from the weather;
Caliban · Act 5, Scene 1
Ariel reports to Prospero that all of his enemies are locked in place by magic, unable to move until he releases them. The line matters because it reveals the full extent of Prospero's control—he has not just manipulated events, he has imprisoned people in an invisible cage. It shows why the play cannot be read as a simple restoration comedy; the ending is purchased at the cost of absolute domination.