To some extent Galatians is the counterpart to James. Both warn about two opposite extremes.
Genuine believers do not use their freedom in Christ as a liberty to sin. Rather, holy living is evidence of genuine faith. That is the message of James.
Genuine believers do not count on their good works to save them, or to continue in God's good graces after being saved. That is the message of Paul in this first portion of Galatians.
We are not saved by good works, we are saved by faith in Christ Jesus. We are not saved by obedience, because none of us are capable of perfect obedience, and perfection is the standard. The law showed us our inability to save ourselves and directed us to Christ, the only One who lived out God's law perfectly and the only One who can give us salvation.
Tomorrow's Bible In a Year Passage: Galatians 4-6