What is the significance of the title "A Good Man is Hard to Find" and how does it add to the understanding of the text?

The title of the story, "A Good Man Is Hard to Find," echoes Red Sammy Butts in his conversation with The Grandmother. The mistrust of others in general is a continuing theme throughout O'Connor's short stories, and in her conversation with Red Sammy Butts, The Grandmother confirms her belief in this idea: "It isn't a soul in this green world of God's that you can trust." This belief contradicts her Christian faith that believes there is sal;vation for men like the misfit but in the end he kills her anyway.