The underlined portion of this reading passage is an example of which literary term? some who had been favored with blindness,

The answer is Paradox.

Paradox is a statement that may seem contradictory but it can be true or at the very least it makes sense. A paradox may be easier to explain with examples. 

Example:

Less is more.

The statement tells us that what is less complicated is more often appreciated. The statement above uses two opposite words that contradict one another.

Cause he said he was william frankenstien and the monster got mad and didnt mean to hurt him