One verse really stood out to me in Chapter 6:
Verse 12: As many as wish to make a good showing in the flesh; they compel you to be circumcised: only that, they should not suffer persecution for the cross of Christ.
I think that is true today in the Church, those that do not want to suffer persecution for the cross of Christ, try to water down the gospel and make it carnal (for this world), rather than spiritual, which is what the gospel is.