(From John Martin, via Wikimedia Commons, used w/o permission.)
I care about God's mercy because I'm a sinner, which doesn't mean what you may think.
First, a quick review of what I don't believe is true. (March 15, 2015)
I'm not "some loathsome insect," and neither are you:
"...every unconverted Man properly belongs to Hell...."Samuel Clemens apparently had a well-defined attitude regarding "converted" folks, and I can't say that I blame him....
"...The God that holds you over the Pit of Hell, much as one holds a Spider, or some loathsome Insect, over the Fire, abhors you...."
"...you will be wholly lost and thrown away of God...."
("Sinners in the Hands of an Angry God," pp. 6, 9, 15, 18; Jonathan Edwards (July 8, 1741) (via Digital Commons@University of Nebraska-Lincoln))
More at A Catholic Citizen in America.