107. Our translation adds that Cain said: "Let us go out doors." But this is one of the comments of the rabbins, whose relative claim to credit I have fully shown on a previous occasion. Lyra, following the invention of Eben Ezra, relates that Cain told his brother how severely he had been rebuked of the Lord. But who would believe statements for which there is no authority in the Scriptures? We hold therefore to an explanation which has the warrant of the Scriptures, namely that Cain, finding himself rejected of God, indulged his anger, and added to his former sins contempt of his parents and of the Word, thinking within himself: "The promised seed of the woman belongs to me as the first-born. But my brother, Abel, that contemptible, good-for-nothing fellow, is evidently preferred to me by divine authority, manifest in the fire consuming his sacrifice. What shall I do, therefore? I will dissemble my wrath until an opportunity of taking vengeance shall occur."
108. Therefore the words, "Cain told Abel his brother," I understand to mean that Cain, dissembling his anger, conducted himself toward Abel as a brother, and spoke to him and conversed with him, as if he bore with good nature the sentence pronounced upon him by God. In this manner also Saul simulated an attitude of kindness toward David. "I know well," said Saul, "that thou shalt surely be king," 1 Sam 24, 20; and yet he was all the while planning to prevent this by killing David. Just so Cain now conversed with Abel his brother, and said: I see that thou art chosen of the Lord; I envy thee not this divine blessing, etc. This is just the manner of hypocrites. They pretend friendship until an opportunity of doing the harm they intend presents itself.
109. That such is the true sense of the passage, all the circumstances clearly show. For if Adam and Eve could have gathered the least suspicion of the intended murder, think you not that they would either have restrained Cain or removed Abel, and placed the latter out of danger? But as Cain had altered his countenance and his deportment toward his brother, and had talked with him in a brotherly manner, they thought all was safe, and the son bowed to and acquiesced in the admonition of his father. The appearance deceived Abel also, who, if he had feared anything like murder from his brother, would doubtless have fled from him, as Jacob fled from Esau when he feared his brother's wrath. What, therefore, could possibly have come into the mind of Jerome when he believed the rabbins, who say Cain was expostulating with his brother?
110. Accordingly, Cain is the image and picture of all hypocrites and murderers, who kill under the show of godliness. Cain, possessed by Satan, hides his wrath, waiting the opportunity to slay his brother Abel; meanwhile he converses with him, as a brother beloved, that he might the sooner lay his hands upon him unawares.
111. This passage, therefore, is intended for our instruction in the ways of murderers and hypocrites. Still Cain talks in a brotherly manner with his brother, and, on the other hand, Abel still trusts Cain as a brother should trust a brother; and thus he is murdered, and the pious parents meanwhile are deceived.
Just so the pope and the bishops of our day talk and confer much concerning the peace and concord of the Church. But he is most assuredly deceived who does not understand that the exact opposite is planned. For true is that word of the Psalm, "The workers of iniquity speak peace with their neighbors, but mischief is in their hearts," Ps 28, 3. For it is the nature of hypocrites that they are good in appearance, speak kindly to you, pretend to be humble, patient and charitable, give alms, etc.; and yet, all the while they plan slaughter in their hearts.