Grace doesn't make sin less dangerous.

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)

Grace does not make sin less dangerous.

Grace does not make sin less dangerous. 

In Genesis 4:7 God warned Cain, "And if you do not do well, sin is crouching at the door; and its desire is for you, but you must master it."  In Hebrews 3:13, He cautioned, "But encourage one another day after day, as long as it is still called "Today," so that none of you will be hardened by the deceitfulness of sin." 

Sin has the power of deception. Examine yourself against the mirror of the Word. (James 1) Look upon your inner man. Be honest. If you ignore a monster in the mirror, sin's power of deception will be your master, and it may become a nightmare from which you never wake up—the worst reality of all.