We are called to live in such a way that reflects God’s glorious attributes & character. And through the work of the indwelling Holy Spirit in our lives, we then are being conformed into the likeness of Christ. (Romans 8:29) Which would be impossible on our own to do in our present physical earthly existence in this corrupt world. But as it says in II Corinthians 7:1, “Since we have these precious promises, let us purify ourselves from everything that contaminates body and spirit, perfecting holiness out of reverence for God.” Our reverence towards God is then the foundation and principal part of godliness or sanctification… guarding us against unrighteous wants & desires of this world.