The Perushim preserved legal interpretation through transmitted rulings and debate. This oral tradition allowed purity, Sabbath, vows, tithes, prayer, and daily conduct to be applied outside the temple precincts.

Its importance after 70 AD is that portable teaching could survive the loss of sacrifice. The later sage tradition grows out of this habit of preserving arguments, rulings, and chains of transmission.

Sources: Josephus; early sage chains; later Mishnah memory of transmitted rulings.

Oral tradition allowed a movement without control of the high priesthood to claim authority in daily life. It moved holiness into meals, Sabbath conduct, vows, tithes, purity habits, and study. That made it powerful before 70 AD and decisive afterward. The node is not meant as a later denominational label; it marks a Second Temple practice of preserving interpretation through teachers, schools, debate, and remembered precedent. It also explains why Perushim continuity could survive outside the altar system while the Tzedukim order was devastated by the sanctuary’s destruction.