Satan wants us to say that we're not ready or not able to break bad habits, and if he can't convince us of that, he does something more insidious: he tries to get us to believe that, "Hey, this sin is fun and that's what grace is for, so it's not that serious! Ain't God great?" DON'T FALL FOR IT! God warns strongly about taking grace (and thus sin) casually, saying,
"Or do you think lightly of the riches of His kindness and tolerance and patience? But because of your stubbornness and unrepentant heart you are storing up wrath for yourself in the day of wrath and revelation of the righteous judgment of God."(Romans 2, in part)
God's love and kindness are great, but if we make light of it, we store up for ourselves wrath and indignation. Let our prayer be to be those who, "by perseverance in doing good seek for glory and honor and immortality, [receive] eternal life." (Romans 2:8)