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In Palestine, the one sanctuary of the worship of Jahve, the Temple, retained its high prestige. The sacerdotal hierarchy, swayed by the aristocratic Sadducean party, strictly maintained the ritual observances. But the luxury, the depravity, the religious indifference of these sacerdotal leaders, their subserviency to the Roman authorities, their contempt for the Messianic hope and the doctrine of the resurrection, had alienated from them the affection of the people, and, in the eyes of some, even cast discredit on the Temple itself. Some indeed were so much disgusted that they fled from the official sanctuary and its servants, and, afar from the world, devoted themselves to the service of God and a strict observance of the Law. The Essenes represented this movement: grouped in small communities they lived on the borders of the Dead Sea, near Engaddi. The Sadducean priests persecuted Jesus Christ and His disciples. As for the Essenes, they lived alongside of the new Faith, and if they did embrace it, it was but slowly. The Pharisees, so often condemned in the Gospels for their hypocrisy, their false zeal, and their peculiar practices, did not form a special sect; the name was applied generally to all those who were ultra-scrupulous in following the Law, and not the Law only, but the thousand observances with which they had amplified it, attributing as much importance to them as to the fundamental precepts of morality. Still, they were faithful defenders of the Messianic hope and of belief in the resurrection. Beneath their proud and overstrained attachment to details of observance, they had a solid foundation of faith and piety. Amongst them the Gospel made many excellent converts.
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Louis Duchesne (Early History of the Christian Church: From its Foundation to the End of the Fifth Century (Volume I))