Psalms 58:4

We hide away our sin, cloaking it over in the depth of our soul, like some festering and malignant disease, as if by escaping human notice we could escape the mighty eye of God and justice. Or else we make excuses for our sins by devising pleas in defense of our falls or by tightly closing our ears. Like the snake that stops its 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.

The heavens were opened, and Stephen saw the chief of martyrs; he saw Jesus standing at the Father's right hand; he saw, so that he would not keep quiet. As for his persecutors, they could not see, but they could be envious; and the reason they did not see was that they were envious. As for Stephen, he did not keep quiet about what he saw, in order to reach the one whom he saw. "Behold," he said, "I can see the heavens opened, and the Son of man standing at the right hand of majesty." Immediately they covered their ears, as against a blasphemy. You can recognize them in the psalm: "Like the deaf cobra," it says, "that blocks its ears, in order not to hear the voice of the charmer and the spell cast by the wise one." Just as snakes, you see, in order to avoid bursting out and leaving their dens when they are being charmed, are said to press one ear to the ground and block the other with their tails—and yet the charmer brings them out. So also Stephen's persecutors were still hissing in their dens, while seething in their hearts. They were not yet bursting out; they blocked their ears. Let them burst out now, let them show what they really are; let them rush for the stones. They rushed, they stoned him.

"Indignation to them after the similitude of a serpent" [Psalm 58:4]. A great thing you are to hear. "Indignation to them after the similitude of a serpent." As if we had said, What is that which you have said? There follows, "As if of a deaf asp." Whence deaf? "And closing its ears." Therefore deaf, because it closes 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" [Psalm 58:5]. 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 knows much better than any men. For it is not to no purpose that of this he has spoken, but because it may chance that true is even that which we have heard of the asp. When the asp begins to be affected by the Marsian charmer, who calls it forth with certain peculiar incantations, hear what it does....Give heed what is spoken to you for a simile's sake, what is noted you for avoidance. So therefore here also there has been given a certain simile derived from the Marsian, who makes incantation to bring forth the asp from the dark cavern; surely into light he would bring it: but it loving its darkness, wherein coiled up it hides itself, when it will not choose to come forth, nevertheless refusing to hear those words whereby it feels itself to be constrained, is said to press one ear against the ground, and with its tail to stop up the other, and therefore as much as possible escaping those words, it comes not forth to the charmer. To this as being like, the Spirit of God has spoken of certain persons hearing not the Word of God, and not only not doing, but altogether, that they may not do it, refusing to hear.