But all the signs are that Gamaliel's bright young pupil from Tarsus wasn't satisfied with this approach. His "zeal" would have placed him in the opposing school, following Hillel's rival Shammai, who maintained that if God was going to establish his reign on earth as in heaven, then those who were zealous for God and Torah would have to say their prayers, sharpen their swords, and get ready for action.
- NT Wright