It's not what I think Dave... it's what the Church teaches:
1850 Sin is an offense against God: "Against you, you alone, have I sinned, and done that which is evil in your sight." Sin sets itself against God's love for us and turns our hearts away from it. Like the first sin, it is disobedience, a revolt against God through the will to become "like gods," knowing and determining good and evil. Sin is thus "love of oneself even to contempt of God." In this proud self- exaltation, sin is diametrically opposed to the obedience of Jesus, which achieves our salvation.
1848 As St. Paul affirms, "Where sin increased, grace abounded all the more." But to do its work grace must uncover sin so as to convert our hearts and bestow on us "righteousness to eternal life through Jesus Christ our Lord." Like a physician who probes the wound before treating it, God, by his Word and by his Spirit, casts a living light on sin.