There are so many good and pretty things in life which can be gotten without stealing and love is a perfect example. Though, some nice things might be hard to find but certainly there are greater things we take for granted that can be gotten easily.
Mr brown is more nice even though him and his partner are wrongfully converting people he is still nice. Okonkwo isnt nice in gereral so he already does not like this new white man that shows up
I believe this all depends on the situation, but I'm leaning towards "To bring about an emotional response as a rhetorical strategy as the best means for conveying critical information." (Or the 2nd one)