And he shall have it, and his descendants after him, even the covenant of an everlasting priesthood; because he was zealous for his God, and made an atonement for the children of Israel.
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Ambrose of Milan
AD 397
God is neither unjust nor is his judgment changeable. For God laid hold of [Balaam’s] mind and the secrets of his heart. For that reason he tested him as a diviner; he did not elect him as a prophet. And certainly he ought to have been converted by the grace of such great oracles and the sublimity of the revelations. But his soul, full of vileness, put forth words, but it did not bring forth faith. He desired to undermine by his counsel what he announced would happen. Since he was not able to give the lie to the oracles, he proposed fraudulent counsels. By these counsels the fickle people of Israel were indeed tested, but they were not overcome. For by the justice of one man, a priest, every plan of that villainous man was undone. It is much more amazing that the multitude of our fathers could be freed through one man than be deceived through one man.
Seed. A short interruption of 150 years (from Heli to Abiathar, of the race of Ithamar) may be accounted trifling in a duration of so many ages, during which the posterity of Phinees enjoyed this dignity. Phinees succeeded Eleazar, and had for his successors, Abiezer, Bocci, and Elsi. (Calmet)
Some add Zararias, Meraioth, and Amarias, upon whose death, 1157 years before Christ, Heli got possession, by some means, and was followed by Achitob, Achielech, and Abiathar, of the same family, till David joined Sadoc with the latter, and he was acknowledged sole pontiff on the rebellion of Abiathar, B.C. 1014. See Lenglet's tables. (Haydock)
We have no proof that the succeeding high priests were of a different family, (Calmet) till our Saviour's time, who re-united in his person the right both to the priesthood and to the kingdom of Israel for ever. See St. Augustine, City of God xvii. 6. (Haydock)
God did not promise that no interruption should take place. He only granted a perpetual right...