John Chrysostom (attributed)

He calls them offspring of vipers, because the nature of vipers is such that the young burst the womb of their dam, and so come forth; and in like manner the Jews condemned their fathers, finding fault with their deeds. He says, How shall ye escape the damnation of hell? By building the tombs of the saints? But the first step of piety is to love holiness, the next, to love the saints; for it is not reasonable in him to honour the righteous, who despises righteousness. The saints cannot be friends to those to whom God is an enemy. Shall ye be saved by a mere name, because ye seem to be among God’s people! Forasmuch as an open enemy is better than a false friend, so is he more hateful to God, who calls himself the servant of God, and does the commands of the Devil. Indeed, before God he who has resolved to kill a worm is a murderer before the deed is done, for it is the will that is rewarded for good, or punished for evil. Deeds are evidence of the will. God then does not require deeds on His own account that He may know how to judge, but for the sake of other men, that they may perceive that God is righteous. And God affords the opportunity of sin to the wicked, not to make them sin, but to manifest the sinner; and also to the good He gives opportunity to shew the purpose of their will. In this way then He gave the Scribes and Pharisees opportunity of shewing their purposes, Behold, I send unto you Prophets, and wise men, and Scribes.