The only weapon to fight sin with!
"Nay, in all these things we are more than conquerors through Him who loved us." Romans 8:37
We go to Christ for forgiveness, and then too often look to our own strength to fight our sins. Paul thus rebukes us, "Are you so foolish? After beginning with the Spirit, are you now trying to attain your goal by human effort?" Galatians 3:3
Take your sins to Christ's cross, for the old man can only be crucified there. The only weapon to fight sin with, is the spear which pierced the side of Jesus!
To give an illustration: you want to overcome an angry temper—how do you go to work? It is very possible you have never tried the right way of going to Jesus with it. How did I get salvation? I came to Jesus just as I was, and I trusted Him to save me. I must kill my angry temper in the same way! I must go to the cross with it, and say to Jesus, "Lord, I trust You to deliver me from it." This is the only way to give it a death-blow.
Are you covetous? Do you feel the world entangle you? You may struggle against this evil as long as you please—but you will never be delivered from it in any way but by the blood of Jesus. Take it to Christ. Tell Him: "Lord, Your name is Jesus, for You save Your people from their sins. Lord, this is one of my sins—save me from it!"
Ordinances are nothing, without Christ as a means of mortification. Your prayers, and your repentances, and your tears—the whole of them put together, are worth nothing apart from Him. "None but Jesus can do helpless sinners good;" or helpless saints either. You must be conquerors through Him who has loved you, if conquerors at all.