I think it is all too easy for the human heart, the Christian heart included, to fall into the trap of works righteousness. Scripturally we know the law cannot save us, and was actually a means to show us our need for the Savior Jesus Christ (Galatians 3:24). Entire false religions in this world are performance-based, but true Christianity is not one of them.
We rest and trust not in our abilities to maintain the moral law, but in the perfect righteousness of Jesus, who already lived a perfect sinless life. (see Romans chapter 3). Hebrews chapter 10 also delineates that Jesus’ sacrifice on the cross was once and for all. Verse 14 says of Jesus, “For by one offering he hath perfected for ever them that are sanctified.” Obviously, this means positionally perfect in God’s sight, not that we will suddenly be sinless as we live day to day.
Christianity isn’t about doing. It isn’t about a living by checklist of good things and avoiding evil things. True faith in Jesus Christ is about done. What HE has already done to save us. We believe it, and throw our selves upon it knowing only His perfect sacrifice can save. Our obedience after that should stem from our love and gratitude to Him and from a changed nature, rather than from a heart trying to earn our salvation.
Yet our hearts wage war within us. If that war is raging in you today, or has been at times, or perhaps you have no idea what I’m talking about. Chris Rosebrough tackles that subject with a blog post from Tullian Tchividjian at the beginning of this episode of Fighting for the Faith. Check it out.