John Calvin on Galatians 4:16

16. Am I therefore become your enemy? He now returns to speak about himself. It was entirely their own fault, he says, that they had changed their minds. Though it is a common remark, that truth begets hatred, yet, except through the malice and wickedness of those who cannot endure to hear it, truth is never hateful. While he vindicates himself from any blame in the unhappy difference between them, he indirectly censures their ingratitude. Yet still his advice is friendly, not to reject, on rash or light grounds, the apostleship of one whom they had formerly considered to be worthy of their warmest love. What can be more unbecoming than that the hatred of truth should change enemies into friends? His aim then is, not so much to upbraid, as to move them to repentance.