Isaiah 65:17

Behold, I am creating new heavens and a new earth; and the former things (of life) will not be remembered or come to mind. But be glad and rejoice forever over what I create; behold, I am creating Jerusalem to be a source of rejoicing and her people a joy.

If God can create a new heaven and earth, imagine what God can do in our spirits. When we are willing, God can make the life of the past no longer remembered, just as God created a new Jerusalem to be a joy. God also wants our born-again lives to be a joy through Jesus. All things are new for the believer in Jesus.