This chapter stands, nevertheless, in close connection of thought with the foregoing. The Apostle's doctrine is grounded in historical fact and personal experience. The theological argument has behind it the weight of his proved Apostleship. The Judaistic dispute at Antioch, in particular, bears immediately on the subject-matter of the third chapter. Peter's vacillation had its counterpart in the defection of the Galatians. The reproof and refutation which the elder Apostle brought upon himself, Paul's readers must have felt, touched them very nearly. In the crafty intriguers who made mischief at Antioch, they could see the image of the Judaists who had come into their midst. Above all, it was _the cross_ which Cephas had dishonoured, whose efficacy he had virtually denied. His act of dissimulation, pushed to its issue, nullified the death of Christ. This is the gravamen of Paul's impeachment. And it is the foundation of all his complaints against the Galatians. Round this centre the conflict is waged. By its tendency to enhance or diminish the glory of the Saviour's cross, Paul judges of the truth of every teaching, the worth of every policy. Angel or Apostle, it matters not--whoever disparages the cross of Jesus Christ finds in Paul an unflinching enemy. The thought of Christ "dying in vain" rouses in him the strong emotion under which he indites the first verses of this chapter. What greater folly, what stranger bewitchment can there be, than for one who has seen "Jesus Christ crucified" to turn away to some other spectacle, to seek elsewhere a more potent and diviner charm! "O senseless Galatians!" I. Here then was the beginning of their folly. _The Galatians forgot their Saviour's cross._ This was the first step in their backsliding. Had their eyes continued to be fixed on Calvary, the Legalists would have argued and cajoled in vain. Let the cross of Christ once lose its spell for us, let its influence fail to hold and rule the soul, and we are at the mercy of every wind of doctrine. We are like sailors in a dark night on a perilous coast, who have lost sight of the lighthouse beacon. Our Christianity will go to pieces. If Christ crucified should cease to be its sovereign attraction, from that moment the Church is doomed.