What is legalism?
Question 07071
The word legalism gets used in at least two quite different ways in contemporary Christianity. Sometimes it means what it should mean: the error of trying to earn righteousness before God through law-keeping, or of adding human rules to Scripture and binding consciences where God has not. Other times it is used as a convenient label for anyone stricter than the speaker about anything at all. Getting the definition right matters, because genuine legalism is a serious theological error with damaging pastoral consequences, and it deserves to be named accurately rather than applied loosely.
Legalism in Salvation: Earning What Can Only Be Received
At its theological core, legalism is the error of treating obedience to the law as the basis for standing before God. The Galatian churches were not being taught to abandon the gospel entirely; they were being taught to supplement it. Jewish believers were telling Gentile Christians that faith in Christ was insufficient for full acceptance before God and that circumcision and the Mosaic law were required in addition. Paul’s response is among the strongest in all of his letters: “I am astonished that you are so quickly deserting him who called you in the grace of Christ and are turning to a different gospel” (Galatians 1:6). He calls it a different gospel because anything that places the ground of acceptance before God in human performance rather than in Christ alone has fundamentally departed from the gospel’s logic.
Romans 3:20 states the principle definitively: “For by works of the law no human being will be justified in his sight, since through the law comes knowledge of sin.” The law was never designed to be the mechanism of justification. Its purpose includes revealing God’s holy character, defining sin, and pointing to the need for a Saviour. To treat it as the means of earning acceptance before God is to misunderstand both what the law is and what the gospel is. Galatians 3:24 describes the law as a tutor or guardian whose function was to lead people to Christ, not to serve as an ongoing basis for standing with God.
Legalism in Practice: Adding to What God Has Required
The second major form of legalism is the addition of human rules to Scripture in ways that bind the conscience as though those rules carry divine authority. Jesus addresses this sharply in Mark 7:8 when he accuses the Pharisees of “leaving the commandment of God and holding to the tradition of men.” The Pharisees had built an extensive system of oral traditions around the Mosaic law to define precisely what counted as obedience. The problem was not that the traditions were necessarily harmful in themselves but that they were elevated to the status of divine requirement and imposed on others as conditions of faithfulness.
Paul confronts a similar tendency in Colossians 2:20–23, addressing ascetic rules about food and festivals and various forms of self-denial: “These have indeed an appearance of wisdom in promoting self-made religion and asceticism and severity to the body, but they are of no value in stopping the indulgence of the flesh.” The rules looked spiritual. They produced an impression of seriousness and devotion. But they had no genuine power to produce holiness, and more critically, they were additions to what God actually required.
The Subtler Form: Performance-Based Relationship With God
Perhaps the most pastorally damaging form of legalism operates not in formal doctrinal statements but in the functional assumptions Christians carry about their relationship with God. The legalist heart measures God’s favour by recent performance. A good week of quiet times, consistent church attendance, and avoided temptations produces confidence before God. A week of failure and inconsistency produces a diffidence about approaching God at all. This is not the gospel, even when the person holding it would correctly affirm justification by faith in a doctrinal statement. It is the practical working out of a legal rather than a grace-based relationship with God.
Galatians 3:3 confronts this directly: “Are you so foolish? Having begun by the Spirit, are you now being perfected by the flesh?” The Galatians had started in grace and were sliding into a performance-based understanding of their ongoing relationship with God. Paul calls this foolish, not because performance does not matter but because it mislocates where acceptance is grounded. Acceptance before God is in Christ, fixed and complete, not fluctuating with daily performance. Obedience flows from that acceptance; it does not produce it.
What Legalism Is Not
There is an important distinction to maintain here. Taking God’s moral law seriously, calling sin sin, maintaining standards of behaviour in a local church, or holding firm convictions about what Scripture teaches is not legalism. The word loses its meaning and its usefulness as a diagnostic category if it simply means “more observant than I am.” A church that takes biblical standards seriously is not necessarily legalistic. A church that treats those standards as the basis for standing before God, or that adds human rules to Scripture and imposes them as conditions of fellowship, has crossed into genuine legalism.
So, now what?
Galatians 5:1 is the pastoral response to legalism: “For freedom Christ has set us free; stand firm therefore, and do not submit again to a yoke of slavery.” The freedom Christ secured is not freedom from obedience but freedom from the crushing weight of trying to make ourselves acceptable to God through our own performance. Obedience that flows from gratitude for grace already received is entirely different in kind from obedience that aims to produce grace. The former is what the Spirit produces; the latter is what legalism demands, and it cannot deliver on its promise.
“For freedom Christ has set us free; stand firm therefore, and do not submit again to a yoke of slavery.” Galatians 5:1