There is change every where. The weather changes (wait five minutes). The news changes (fake or real). Gas prices change (ouch). Nothing seems to stay the same.
Peter states that those who follow Jesus are always in the state of changing. We are changing because of sanctification. It is a long word which means making different or making holy. When we start following Jesus, the Holy Spirit enters our life at baptism and starts changing our lives to reflect Jesus. There is submission to the changes, but there will always be changes. This is good.
For those who follow Jesus, we want the Spirit to change us into the image of Christ. For one day we will stand before the Father in judgment and our desire is that the Father sees Jesus in us.