As many as desire to make a fair show in the flesh, they constrain you to be circumcised; only lest they should suffer persecution for the cross of Christ.
All Commentaries on Galatians 6:12 Go To Galatians 6
Ambrosiaster
AD 400
To please “in the flesh” means to please human beings. For those he calls false apostles, in order that they gain the approval of the Jews or at least not elicit their hostility, were preaching Christ in such a way that they also taught the necessity of observing the law. Paul was never intimidated by his opponents. He consistently refused to keep silent about the truth. He constantly was attentive to what he was teaching and how he was living.