Galatians 4:20

Observe his warmth, his inability to refrain himself, and to conceal these his feelings; such is the nature of love; nor is he satisfied with words, but desires to be present with them, and so, as he says, to change his voice, that is, to change to lamentation, to shed tears, to turn every thing into mourning. For he could not by letter show his tears or cries of grief, and therefore he ardently desires to be present with them. I know not, says he, what to say, or what to think. How is it, that ye who by dangers, which ye endured for the faith's sake, and by miracles, which ye performed through faith, had ascended to the highest heaven, should suddenly be brought to such a depth of degradation as to be drawn aside to circumcision or sabbaths, and should rely wholly upon Judaizers? Hence in the beginning he says, "I marvel that ye are so quickly removing," and here, "I am perplexed about you," as if he said, What am I to speak? What am I to utter? What am I to think? I am bitterly perplexed. And so he must needs weep, as the prophets do when in perplexity; for not only admonition but mourning also is a form in which solicitous attention is often manifested. And what he said in his speech to those at Miletus, "By the space of three years I ceased not to warn every one with tears, he says here also, "and to change my voice." (Acts 20:31.) When we find ourselves overcome by perplexity and helplessness which come contrary to expectation, we are driven to tears; and so Paul admonished them sharply, and endeavored to shame them, then in turn soothed them, and lastly he wept. And this weeping is not only a reproof but a blandishment; it does not exasperate like reproof, nor relax like indulgent treatment, but is a mixed remedy, and of great efficacy in the way of exhortation. Having thus softened and powerfully engaged their hearts by his tears, he again advances to the contest, and lays down a larger proposition, proving that the Law itself was opposed to its being kept. Before, he produced the example of Abraham, but now (what is more cogent) he brings forward the Law itself enjoining them not to keep itself, but to leave off. So that, says he, you must abandon the Law, if you would obey it, for this is its own wish: this however he does not say expressly, but enforces it in another mode, mixing up with it an account of facts.