We have met the enemy, and he is us.
~ Walt Kelly, Pogo
Christians are expected (by God, by the World) to live differently. The Holy Spirit enables this by making us aware of our sinful habits, giving us the desire to replace them with Something Better, and the ability to do so. That last bit is where it gets interesting.
Each propensity toward sin is an evil Mini-Me, encamped inside. There are tons of them; they form a vicious, insidious army. Mini-Me soldiers don't fight fair. They show no mercy. In short, they are most unpleasant. Daily, I am forced to ward off their attacks. Protected by God's armor, like the rest of you, I've been given one weapon: the Sword of the Spirit; the Word of God. (Yes, it's a sword, but I like to imagine a bayonette.)
Die, Pride! Take that, Coveting! Sorry, Judgmental, but you have to go. Make way for God's army: Humility, Contentment, Grace. (Ammo: Proverbs 18:12, 1 Tim 6:6, Romans 14:4, respectively.)
If I fail to put up a fight, I make myself and everyone around me miserable; therefore, passivity is not an option. Keep your guard up, Girl, and wield your sword. Or, your bayonette.
For we know that our old self was crucified with him so that the body ruled by sin might be done away with, that we should no longer be slaves to sin. ~ Romans 6:6