The letter from Paul to the church in Galatia was written while he was imprisioned in Rome (Galatians 4:3, 10, & 18; Acts 28:16-31). Paul's purpose for writing was to confront those who began orally abrogating/perverting the gospel he previously taught them (Gal 1:6-9; 3:13; 4:4-5; 4:13). In the Apostle Paul's absence, some influencial people in the Galatian church began teaching that circumcision (Gal 5:2), keeping laws (Gal 3:5), and observing Jewish holidays (Gal 4:2) was neccesary to maintain a justified status in the sight of God, and for the purpose of salvation. It was another gospel that led people away from the "righteousness of God in Christ reconcilling the world unto Himself" in pursuit of their own righteousness unto eternal damnation(Gal 3:10-11). Circumcision, keeping laws, and observing holidays in and of themselves was not the problem. After all, NOT stealing is good. Rather, it was the motivation, purpose and rationale for doing these things, and being perpetuated that the Apostle Paul condemns when analysing the context. He argues that salvation can only be realized by grace through faith in accordance to the gospel he received/taught them. In the course of comparing/contrasting slave status under law with being heirs to the promise through Christ, Paul articulates the gospel stating "But when the time had fully come, God sent his Son, born of a woman, born under law to redeem those under law, that we might receive the full rights of sons. Because you are sons, God sent the Spirit of his Son into our hearts, the Spirit who calls out 'Abba, Father.' So, you are no longer a slave, but a son; and since you are a son, God has made you also an heir" (Gal 4:4-7; Also Compare Gal 3:26-29 with Eph 3:6-7). Moreover, one needs to perservere in the gospel Paul taught them by grace throuh faith. Paul pleads with those in Galatia embracing "another gospel" to redirect their faith (Gal 4:19), and warns that those "who are trying to be justified by law have been alienated from Christ; you have fallen away from Grace (Gal 5:4)." Falling away from grace in the context of being "Alienated from Christ" means loss of saving faith which not only entails the loss of personal rewards/inheritence, but loss of eternal life found exclusively in Christ. There is no assurance of lasting life if you are "alienated from Christ" because there is no lasting life apart from Messiah Yeshua (Read John). This is crucial because there are entire post-Biblical movements that begin with the ABC's of the Biblical doctrine of justification by faith but immediately abandon them in pursuit of their own righteousness under law. Paul would say one must begin, continue, and finish by grace through faith in Jesus of which works of righteousness will follow in terms of being/doing all God intends. Not only do we suffer but God suffers when we persevere in misplaced faith (cf. Ephesians 1:18 ). We must "Abide in the vine," or persevere in belief by grace through faith as outlined in this letter (cf. 1 Peter 1:5). It is the difference between man trying to live for God and God trying to live His life through us. See also Romans 11:20-24.

I was confronted with many  hard questions as a result of studying this epistle. Also Compare Galatians 1:8-9 and 2 Corinthians 11:14.