You can find the nouns in boldface:
C enables programmers to control pointers and memory. Great power brings great responsibility.
Now suppose the second sentence was the following:
Great control brings great responsibility.
Is "control" a verb or is it a noun?
In this context, "control" is a noun, even though "to control" in the first sentence is a verb. Many words in English serve as a noun in some contexts and a verb in others.