The Apostle Paul writes the letter to the Galatians to tell them that their salvation depends on their belief in Messiah, the Christ, and Him alone. The Good News, or Gospel, is that of Messiah and the reign of God. The reign, or kingdom of God, or Elohim, in Messiah is that we hear Him, obey Him, as He gives us Instruction/Torah in real time. It isn't up to us to decide how to walk this walk. Nor is it up to others. We are to be His disciples, His taught-ones, and walk as He leads and instructs.