The physical manifestation of free-will being suppressed on the island can be found in Prospero's two servants, Ariel and Caliban. They both give their labor and services to Prospero as the result of being indebted to him or as punishment. Ariel's freedom is held hostage as Prospero still needs him to help him accomplish his plans for the group of people who sent him to the island in the first place: "Is there more toil? Since thou dost give me pains, Let me remember thee what thou hast promised, Which is not yet performed me"[2] (1.2. 242-244) Prospero constantly reminds Ariel that he is the one who freed him from his prison, putting him in his place when he pleas for his freedom: "Thou liest, malignant thing! Hast thou forgot The foul witch Sycorax, who with age and envy Was grown into a hoop? Hast thou forgot her?" (1.2. 255-257) Caliban performs much of the manual labor and undesirable labor for Prospero and his daughter Miranda. Prospero states that he had tried to educate Caliban and was kind to him, until Caliban attempted to rape Miranda. "Thou most lying slave, Whom stripes may move, not kindness! I have used thee, Filth as thou art, with human care, and lodged thee In mine own cell till thou didst seek to violate The honor of my child"[2] (1.2. 344-349) Prospero states that Caliban responds better to his whip rather than his kindness. The whip marks on his back resemble "a portion of the surface long in proportion to its breadth, or uniform width, and differing in color or texture from the adjacent parts"[1] like a tiger. Miranda herself states that him coming on to her wasn't why he is in service to them, but rather that he was born a slave. [...] "I pitied thee, Took pains to make thee speak, taught thee each hour One thing or other: when thou didst not, savage, Know thine own meaning, but wouldst gabble like A thing most brutish, I endow'd thy purposes With words that made them known. But thy vile race