Matthew 23:31

“Wherefore ye be witnesses unto yourselves, etc.] Or “against yourselves”, as the Syriac reads; for what they said was a plain acknowledgment, and a full confession, what their fathers had done, and whose offspring they were; and from whom better things were not to be expected; since they were their fathers’ own children, and of the same temper and disposition with them: that ye are the children of them that killed the prophets. They plainly owned, that their fathers killed the prophets, and that they descended from them; though they meant not so much to reproach, their ancestors, as to give themselves a greater character; yet it did not with those, that knew them; not with our Lord: for as…”

“Ye be witnesses unto yourselves - The emphasis, here, lies in the words “to yourselves.” It is an appeal to their conscience. It was not by their building the tombs that they were witnesses that they were the children of those who killed the prophets; but that, in spite of all this pretence of piety, under all this cloak of profession, they knew in their consciences, and were witnesses to themselves, that it was mere hypocrisy, and that they really approved the conduct of those who slew the prophets. Children of them ... - Resembling them; approving their conduct; inheriting their feelings. See the notes at Matthew 1:1. They not only showed that they were descended from them, but that they…”

“Wherefore ye testify against yourselves - By your smooth words as well as devilish actions: that ye are the genuine sons of them who killed the prophets of their own times, while they professed the utmost veneration for those of past ages. From Mat. 23:3-30 is exposed every thing that commonly passes in the world for religion, whereby the pretenders to it keep both themselves and others from entering into the kingdom of God; from attaining, or even seeking after those tempers, in which alone true Christianity consists. As, Punctuality in attending on public and private prayer, Mat 23:4-14. Zeal to make proselytes to our opinion or communion, though they have less of the spirit of religion…”

“witnesses: Jos 24:22; Job 15:5, Job 15:6; Psa 64:8; Luk 19:22 that: Act 7:51, Act 7:52; Th1 2:15, Th1 2:16 Matthew 23:32”