Matthew 14:4

For John said unto him, It is not lawful for thee to have her. - Here is an instance of zeal, fidelity, and courage, highly worthy of imitation. Plainness, mildness, and modesty, are qualifications necessary to be observed when we reprove the great. The best service a subject can render his prince is to lay before him, in the plainest but most respectful manner, what the law of God requires of him, and what it forbids. How unutterable must the punishment of those be who are chaplains to princes, or great men, and who either flatter them in their vices, or wink at their sins!

14:4 It is not lawful for thee to have her — It was not lawful indeed for either of them to have her. For her father Aristobulus was their own brother. John's words were rough, like his raiment. He would not break the force of truth by using soft words, even to a king.