Luther on Galatians 1: The World At Its Best

"Paul justly calls it the evil or wicked world, for when the world is at its best the world is at its worst. The grossest vices are small faults in comparison with the wisdom and righteousness of the world. These prevent men from accepting the Gospel of the righteousness of Christ. The white devil of spiritual sin is far more dangerous than the black devil of carnal sin because the wiser, the better men are without Christ, the more they are likely to ignore and oppose the Gospel."

Very, very well put.