Reading for today, Colossians 3:4-10, I am reminded of the things that I used to do. Paul tells the Church at Colosse that when Christ appears, we will appear with Him in glory (raised with a glorified body), but he also reminds them of the things they used to do and should not still be doing because of the new self created in Christ.
The point of this passage of scripture is simply this: We have a past–used to do some things that were ungodly, illegal, immoral, and unethical. We used to lie, hold onto anger, bitterness and unforgiveness. But that was then–when we did not know we had a Savior who loved us enough to die for us. Now that we know, who He is and who we are in Him, none of those things we used to do (in opposition to God and self) should be a part of our new nature. If they are, are we really a new creation or have we just taken up a facade (external attributes), but our thought-life, our inner nature, has not changed?
God knows those who are His and if we are attempting to fool anyone; the only person we fool is ourselves. When the enemy plants thoughts in our minds, remind him–“I used to do those things, but they are no longer part of my life!”
Now, we can start doing some new things–those things that will glorify God–and assure us of our new nature and then we can look the enemy in the face and say, “Look at me now and see what I am doing right now!” We can defeat the power of the enemy, by not dwelling on the things we used to do, but preparing to do all that God has planned for us!