How were Paul's conversion tactics similar to those of Greco-Roman philosophers?

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The Answer is Paul's missionary activity was more like that of the philosophical schools than the Greco-Roman religions because he preached an exclusive way of life: Christians had to give up their former beliefs to follow Jesus. Greco-Roman religions were, moreover, not missionizing religions; however, some philosophical schools did actively seek converts. Like Paul, proselytizing philosophers focused on urban settings where there were a number of potential converts. Many were connected to wealthy households, but some, like Paul, believed in working for their living and were not dependent on others.

How Were Paul's Conversion Tactics Similar to Those of Greco-Roman