Matthew 23:31

What kind of accusation is this, to Call one the son of a murderer, who partakes not in his father's disposition? Clearly there is no guilt in being so; wherefore this must be said in proof of their resemblance in wickedness.

What they thought in their hearts, that they spoke by their deeds. Christ lays bare here the natural habit of all wicked men; each readily apprehends the other's fault, but none his own; for in another's case each man has an unprejudiced heart, but in his own case it is distorted. Therefore in the cause of others we can all easily be righteous judges. He only is the truly righteous and wise who is able to judge himself. It follows, Wherefore ye be witnesses unto yourselves, that you are the children of them which killed the Prophets. The character of the parents is a witness to the sons; if the father be good and the mother bad, or the reverse, the children may follow sometimes one, sometimes the other. But when both are the same, it very rarely happens that bad sons spring of good parents, or the reverse, though it be so sometimes. This is as a man is sometimes born out of the rule of nature, having six fingers or no eyes.

We will carefully investigate what the Savior says. The forefathers of the Jews killed the holy prophets who were transmitting the divine word to them in those times. They surely have become witnesses for some of them, because the prophets are now revered and honored. They have placed crowns on their heads or assign … honor to their tombs as to holy things, for believing the prophets to be holy men, they have become the judges of those who have killed them. For by honoring them in this way, they have spoken against those who killed them, and through these things they accuse them of having acted wickedly. But though they agreed to condemn the murders committed by their own forefathers, they were about to become threshing floors for the same kind of evils, indeed, to things even worse. They "killed the author of life" and added to their impieties against him other murders, those of his holy apostles. For while one scrutinizes the sins of others, making a decision according to one's innate reason, one sees the wickedness and censures it.… He who is led into similar passions is like a blind man carried away.