Legalism (theology)
...The words 'legalism' or 'legalist' do not occur in the Old or New Testaments. Legalism's root word, "law" (Greek nomos), occurs frequently in the New Testament, and sometimes connotes legalism. In 1921, Ernest De Witt Burton stated that in Gal. 2:16, "nomou is here evidently used ... in its legalistic sense, denoting divine law viewed as a purely legalistic system made up of statutes, on the basis of obedience or disobedience to which men are approved or condemned as a matter of debt without grace. This is divine law as the legalist defined it."[1] The Greek of Paul's day lacked any term corresponding to the distinct position of "legalism", "legalist", or "legalistic", leading C.E.B. Cranfield to commend "the possibility that Pauline statements which at first sight seem to disparage the law, were really directed not against the law itself but against that misunderstanding and misuse of it for which we now have a convenient terminology" (legalism).[2] Messianic Jewish Bible translator David H. Stern cited these two scholars to support the translation framework that often "'nomos' means 'legalism' and not God's Torah", especially in Paul's constructs erga nomou (literally "works of law", rendered by Stern "legalistic observance of Torah commands") and upo nomon (literally "under law", rendered by Stern by 13 words, "in subjection to the system which results from perverting the Torah into legalism").[3]
One concept of legalism, the belief that salvation can be earned by obedience to laws, is referred to in various New Testament books, including Galatians. In this case, some Jews who had become Christians believed that in order to obtain salvation, both faith in Christ (as Messiah), and obedience to the Mosiac laws were required (such as the cases of the Noahide Laws or the circumcision controversy).
Legalism refers to any doctrine which states salvation comes strictly from adherence to the law. It can be thought of as a works-based religion. Groups in the New Testament falling into this category include the Pharisees, Sadducees, Scribes, Judaizers, and Nicolaitans. They are legalists because they emphasized obeying the Law of Moses, in the case of the Pharisees and Scribes, to the letter without understanding the concept of grace. Jesus condemned their legalism in Matthew 23. The Pharisees love of the praises of men for their strict adherence is a prime example of legalism.
Legalism is sometimes confused with obedience. New Testament books such as Romans, speak of grace and obedience together. An example is found in Romans 1:5 (New American Standard Version) speaking of Christ 'through whom we have received grace and apostleship to bring about the obedience of faith among all the Gentiles, for His name's sake...' The goal of receiving the grace was to bring about obedience of faith. Here grace, faith and obedience are tied together. Other references are in Acts 5:29, 32; Romans 16:19; 2 Corinthians 7:15; Hebrews 5:9.
Legalism is also confused with discipline, which is often spoken of in a positive light. See 1 Corinthians 9:17; 1 Timothy 4:7; 2 Timothy 1:7 and Hebrews 12:5-11.
A third common misunderstanding of legalism is the word law. Law in many places in the Bible refers to the Law of Moses, see also Biblical law in Christianity. In Galatians the Judaizers were trying to insist that salvation required that a person be circumcised prior to obeying the Law of Christ.
Galatians 2:16 says, "Knowing that a man is not justified by the works of the law, but by the faith of Jesus Christ, even we have believed in Jesus Christ, that we might be justified by the faith of Christ, and not by the works of the law: for by the works of the law shall no flesh be justified" (King James Version). The faith here is the Law of Christ and the law here is the Law of Moses. The legalism of the Judaizers was that obedience to the law of Moses was necessary to be saved....
http://en.wikipedia.org/wiki/Legalism_(theology)