Abhorred slave,
Which any print of goodness wilt not take,
Being capable of all ill! 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 endowed thy purposes
With words that made them known. But thy vile race,
Though thou didst learn, had that in ‘t which good natures
Could not abide to be with. Therefore wast thou
Deservedly confined into this rock,
Who hadst deserved more than a prison.
– William Shakespeare
The Tempest, Act 1, Scene 2. Miranda tells Caliban that he has such an evil nature he cannot be shaped into anything good. Taking pity on him at first, she said that she spent much time educating him and teaching him to speak, but because of his evil nature no good person could abide to be with him. So he deserves to be confined to this rock prison, she believes. Prospero’s colonizer attitude to the "savage" slave who needs to be rescued from his "brutish" nature comes across loud and clear in Miranda’s words about Caliban. He is depicted as sub-human, a monster.