The parable we hear today, in which an arrogant judge gives justice to a widow only because he gets sick of her asking him, is similar to another parable in Luke's Gospel. There, a man refuses to get out of bed to assist his neighbor in the middle of the night. Jesus simply concludes, "If the man doesn't get up to help his neighbor because of their friendship, he will because of his persistence." I.e. He will get tired of the knocking! The point is similar for both parables: If arrogant or lazy people will do good because of the persistence of the one asking them, how much more will our perfectly good Father in heaven do good to those who ask Him with persistence?!?