So this I say, and affirm together with the Lord, that you walk no longer just as the Gentiles also walk, in the futility of their mind, being darkened in their understanding, excluded from the life of God because of the ignorance that is in them, because of the hardness of their heart; and they, having become callous, have given themselves over to sensuality for the practice of every kind of impurity with greediness.
But you did not learn Christ in this way, if indeed you have heard Him and have been taught in Him, just as truth is in Jesus, that, in reference to your former manner of life, you lay aside the old self, which is being corrupted in accordance with the lusts of deceit, and that you be renewed in the spirit of your mind, and put on the new self, which in the likeness of God has been created in righteousness and holiness of the truth.
New American Standard Bible, 1995 Edition
While many people do not like change we are called to be changed. St. Paul recognizes the believers in the Ephesian Church have put off their old selves and no longer live like the other Gentiles of the city.
St. Paul also calls those same believers to continue to move in the new life that has been provided by Christ, which means more change is coming.