How can you tell if a religious teacher comes from God?  There are so many people who say that they represent Spiritual truth, and God, but how can you know?  In this passage, the Apostle Paul talks about himself in comparison to the teachers who came to the Galatian churches to teach religious legalism.  And he talks about his qualities versus theirs.  
Well these same qualities can be used as a guide today to determine if your religious teacher comes from God.