I view this comic as a near perfect example of the way humans should act toward each other.  In part I of the comic, the stick figure eats (or at least attempts to eat) one of the chips, which are apparently "free samples".  Now, the stick figure realizes that he has never confirmed his previous assumption that the chips are free, and so asks the purplish person.

The purplish person's response is clearly one of patience and love. 

And in the third frame, the purplish person does something that is usually very hard.  He admits he is wrong.  And he's not defensive or upset about it.

This is the way we should act toward one another.  It's so beautiful.  And it works so well.  And I beleive it's what God wants us to do =)