Psalms 57:6

4. “All have gone out of the way, they have together become useless:” that is, the Jews have become as the Gentiles, who were spoken of above. “There is none that doeth good, no not up to one” ( ver. 3 ), must be interpreted as above. “Their throat is an open sepulchre.” Either the voracity of the ever open palate is signified: or allegorically those who slay, and as it were devour those they have slain, into whom they instil the disorder of their own conversation. Like to which with the contrary meaning is that which was said to Peter, “Kill and eat;” that he should convert the Gentiles to his own faith and good conversation. “With their tongues they have dealt craftily.” Flattery is the companion of the greedy and of all bad men. …

6. “Indignation to them after the similitude of a serpent” ( ver. 4 ). A great thing ye are to hear. “Indignation to them after the similitude of a serpent.” As if we had said, What is that which thou hast said? there followeth, “As if of a deaf asp.” Whence deaf? “And closing its ears.” Therefore deaf, because it closeth its ears. “And closing its ears.” “Which will not hearken to the voice of men charming, and of the medicine medicated by the wise man” ( ver. 5 ). As we have heard, because even men speak who have learned it with such research as they were able, but nevertheless it is a thing which the Spirit of God knoweth much better than any men. For it is not to no purpose that of this he hath spoken, but because it may chance that true is even that which we have heard of the asp. …

Such are the lessons in which I have been trained and therefore I was unwilling to return bite for bite, and to attack you by way of retaliation; and I thought it better to exorcise the madness of one who was raving, and to pour in the antidote of a single book into his poisoned breast. But I fear I shall have no success, and that I shall be compelled to sing the song of David, and to take his words for my only consolation:

20. For we either hide away our sin, cloaking it over in the depth of our soul, like some festering and malignant disease, as if by escaping the notice of men we could escape the mighty eye of God and justice. Or else we allege excuses in our sins, by devising pleas in defence of our falls, or tightly closing our ears, like the deaf adder that stoppeth her ears, we are obstinate in refusing to hear the voice of the charmer, and be treated with the medicines of wisdom, by which spiritual sickness is healed. Or, lastly, those of us who are most daring and self-willed shamelessly brazen out our sin before those who would heal it, marching with bared head, as the saying is, into all kinds of transgression. …

XXXIV. If you were full of leprosy, that shapeless evil, yet you scraped off the evil matter, and received again the Image whole. Shew your cleansing to me your Priest, that I may recognize how much more precious it is than the legal one. Do not range yourself with the nine unthankful men, but imitate the tenth. For although he was a Samaritan, yet he was of better mind than the others. Make certain that you will not break out again with evil ulcers, and find the indisposition of your body hard to heal. Yesterday meanness and avarice were withering your hand; to-day let liberality and kindness stretch it out. …