As we have seen, Judaism in the Hellenistic and Roman period was financed through a system of travelling "apostles" and collectors, who followed up the dispersed Jewish race wherever it flourished, and got together great revenues for the temple service and the priestly and rabbinical class. Jesuism began on those lines, and so set up habits of intercommunication between its groups, which for their own part were locally and independently financed by their members in the Greek and Jewish fashion. Whatever may have been the practice of enthusiasts such as Paul would appear to have been, the principle that "the labourer is worthy of his hire" must have become general; and insofar as special preaching was a requisite and an attraction for the members, the travelling preachers would have to be fee'd or salaried. One of the later epistles makes mention of apostles, prophets, evangelists, pastors, and teachers, as different types; also of elders (presbyters), deacons, and bishops (overseers); and as the groups increased and began to possess buildings, the creation of professional opportunities set up a new economic interest in propaganda.
In neither Greek nor Roman life was the phenomenon new. Centuries before the Christian era, the influx of the Dionysian and other mystic cults in Greece had been followed by the rise of swarms of religious mendicants, many of whom carried with them sacred books and ministered consolation while playing on credulity; and on a higher plane the educated "sophists" or humanists of the pre-Macedonian period had made a livelihood by moral and philosophical teaching or lecturing. Later, the Stoics and other philosophers became a species of religious directors or "spiritual advisers" as well as ethical lecturers; and in Rome especially this calling had practically the status of a profession. Thus had arisen a specific means of livelihood for educated men without official posts or inherited incomes. But any religious cult which should set up an organization would have as against such teachers an obvious financial advantage, in respect of its power of attracting numbers, its local permanence, and its means of collecting revenue; and even men incapable of success as lecturers could attain relatively secure positions as presbyters or "bishops"--that is, overseers, first of single churches, and later of district groups. The original function of the bishop was that later assigned to "elders" in the presbyterian system--the supervision of the public offerings or "collections" and their distribution among needy brethren. Later, the bishop became the religious head of the group, and its representative in communication with others. Not till such organization was reached could the new sect count on permanence.