Our biggest temptation as humans is works righteousness – thinking that we can earn our salvation by own goodness. Ask the average nominal Christian in America how he knows he is saved and you’re likely to hear, “Well, I’m a pretty good person.” Even those who recognize that they are saved by grace alone often feel the temptation to believe they are “kept,” at least in part, by their good works. While we are certainly saved for good works (Eph 2:8-10; Tit 2:11-12), good works cannot save us or keep us saved. Our trust in Jesus alone saves us. Faith causes salvation – good works are the effect.
We could never do enough good works to be accepted by God because, in God’s economy, good works cannot cancel out evil works. And it’s our evil works that are the problem. They are an affront to God’s holiness. If we are to have a relationship with a holy God, our evil works have to be dealt with. The problem is that mankind has no ability to atone for his evil works. Only God can do that. And He did. He became a man and paid the penalty for our sin (death) on the cross. The sinless man died in the place of sinful man. The way we access the atonement God provided for us is by trusting in Jesus and what He did for us on the cross. Since God’s acceptance of us is based entirely on Jesus’ work rather than our own, God’s continued acceptance of us is also based on Jesus’ work rather than our own (Rom 5:8-11).