It seems as if every product these days must be new and improved to be acceptable to the consumer. Is it possible for a product or a person to be completely new? New Coke must retain the essence or formula of the old product or we may be creating Pepsi.
When the Apostle Paul speaks about a new self and old self, a new and old attitude, a new and old creation, ( Eph 4: 22-24) he refers to the former way of life versus the new way. When John talks about a new commandment he means a Christ-like love rather than a self-love. ( Jo 13: 34) Nicodemus, a teacher and Pharisee, had to learn the meaning of a new life from Jesus. ( Jo 3: 3)
Christ Jesus will transform our lowly bodies so that they will be like his glorious body ( Phil 3: 21) ( 1 Jo 3:2) Paul explains this further by comparing our natural body and our spiritual body to the changing of a seed to a full-grown plant. ( I Cor 15: 35-38) What we will become appears to be very different from who we are, our soul, which will still maintain the image with which God created us. ( Gen 1: 26-27)
When the Old Testament was replaced by the New Testament, ( 2 Cor 3:6) ( Lk 12:20) ( Gal 4:24) ( Heb 9: 15) both still contained the moral teachings that God expects as well as his mercy, love and grace. The Old Testament was not discarded for lack of usefulness, rather it served as a schoolmaster to bring us to Christ until all was fulfilled. ( Gal 3: 24-25)
Therefore old is not always bad nor new always good. A very interesting and wise proverb says, “ Don’t throw out the baby with the bathwater.” ( Google it?)