A legalist is a person who vainly imagines that righteousness is obtained, improved or conditioned upon personal obedience to the law of God. A legalist is not one who simply seeks to live by the rule of the ten commandments, but one who makes his obedience to the law of God the basis of justification, sanctification, and reward in heaven. A legalist is one who seeks to add his obedience, to Christ's obedience to gain or improve a favoable relationship with God. And in so doing he makes the blood of Christ and the grace of Cod of non-effect to himself. Read Galatians 5:1-4! The believer's only righteousness before God is the righteousness of Christ imputed to him by grace alone (Rom. 5:19; 1 Cor. 1:30). Christ is "THE LORD OUR RIGHTEOUSNESS" (Jer. 23:6).