To bear one another's burdens fulfills the law of Christ.
The exhibition of the fruit of the spirit is evidence of a saved life
Those who are led by God's spirit will put to death the deeds (works) of the flesh, and will continually exhibit the fruit of the spirit.
God's love is the fulfillment of the law
The allegory of of Sarah and Hagar represents the crucial differences between the Old Covenant and New Covenant
Paul exhorts the wayward Galatians to become like him—to fully trust in Christ alone and not the law.
Departure from the gospel by reverting back to the ceremonies of the Mosaic law.