John Calvin's Bible Commentary
Jeremiah 51:60
Here we see, on one hand, what courage the Prophet had, who dared to command the king’s messenger; for though Seraiah was a meek man, so as to render himself submissive, yet Jeremiah exposed himself to danger; for he might have been timid, though he was neither proud nor arrogant; and thus, as men are wont to do when terrified, he might have referred to the king what he had heard from the Prophet. Then Jeremiah did what we here read, not without danger; and hence appears his firmness. We then see that he was endued with the spirit of invincible courage, so as to discharge his office freely and intrepidly.
On the other hand, we have to observe not only the meekness of Seraiah, but also his piety, together with his modesty; for except he had in him a strong principle of religion, he might have adduced plausible reasons for refusing. As, then, he was so submissive, and dreaded no danger, it is evident that the real fear of God was vigorous in his soul.
And these things ought to be carefully noticed; for who of our cornfly princes can be found at this day who will close his eyes to all dangers, and resolutely disregard all adverse events, when God and his servants are to be obeyed? And then we see how pusillanimous are those who profess to be God’s ambassadors, and claim to themselves the name of Pastors. As, then, teachers dare not faithfully to perform their office, so on the other hand courtly princes are so devoted to themselves and to their own prudence, that they are unwilling to undertake duties which are unpopular. On this account, then, this passage, with all its circumstances, ought to be carefully noticed.