Read the following excerpt from William Shakespeare's The Tempest: PROSPERO
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 endow'd 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.

CALIBAN
You taught me language; and my profit on't
Is, I know how to curse. The red plague rid you
For learning me your language!

Discuss two of this excerpt's themes. How does Shakespeare develop these two themes over the course of the entire play?