Ephesians 4:20 But that is not the way you learned Christ!— assuming that you have heard about him and were taught in him, as the truth is in Jesus, to put off your old self, which belongs to your former manner of life and is corrupt through deceitful desires, and to be renewed in the spirit of your minds, and to put on the new self, created after the likeness of God in true righteousness and holiness.
Romans 6:6 We know that our old self was crucified with him in order that the body of sin might be brought to nothing, so that we would no longer be enslaved to sin.
Titus 3:3 For we ourselves were once foolish, disobedient, led astray, slaves to various passions and pleasures, passing our days in malice and envy, hated by others and hating one another.
You have been outside in the hot sun working all day, sweating, and getting dirty. You have been invited to a friend’s house for a bbq with others. After working all day you need a shower and good washing. When you dry off you put on the same old sweaty, stinky, dirty clothes you have been in all day and head out the door to meet up with your friends. This makes no sense, does it? It would be foolish to think that just because you have had a shower your clothes would be clean and appropriate to wear.
Numerous scriptures tell us; “Put off your old self”, “Our old self was crucified”, “Put on the new self”. Why would we put on the same dirty, foul, disobedient, passions, and pleasures after we have been washed clean from all of these? Why would we think these are ok to “wear”? Jesus Christ died to cleanse us from all of this. Paul is saying, “why would you take the cleansing and go back to doing the very things that needed cleansing?” This makes no sense.
Once we are cleansed we do well to honor and glorify our “Cleanser” Jesus Christ. The Holy Spirit has been given to every believer so that they can continue to grow in understanding and knowledge of the grace, mercy, and love that Jesus Christ poured out on us. When we desire this growth and seek it, we will not become complacent and neglectful in His Word, nor will we keep trying to put on our “Old Self”