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.