Because we have these promises, dear friends, let us cleanse ourselves from everything that can defile our body or spirit. And let us work toward complete holiness because we fear God.
(2 Corinthians 7:1).
Our standard in life is not to be a "good person." There are many good people. A good person is defined as someone who is decent and kind compared to everyone else. That standard is too low.
We are called to live holy lives. Lives that are free from sinful entanglements and God-defying thinking. We are called to honor God in our hearts and in our lives. It is a standard we will not achieve in this life but it is something we should be working toward.
Paul says we should try to cleanse ourselves from anything that defiles body or spirit. We spend a good portion of the time trying to find ways to cleanse our bodies . . . but we must also be looking for ways to cleanse our spirit so God's Spirit might shine in us and through us. Our times in prayer and in God's Word should be as important to us (it should be MORE important) as physical exercise.
Don't settle for lesser things. Focus on the true goal and strive to reach it.