By the 6th century B.C. more or less similar religious beliefs were held in common in all regions inhabited by the Greeks . These beliefs formed the basis of the Olympian religion , so called after Mount Olympus which was believed to be the home of the Gods , headed by Zeus . The Olympian religion was not connected with any organised religious body , dogma or ritual . The temples of the gods , though of definite significance in the religious lives of the people , did not , how ever , form a single system ; likewise , there was no special strata of religious attendants , no high priests . When necessary sary , persons chosen by the popular assembly carried out various religious functions . By making the gods human , the Olympian religion was able to penetrate deep into the masses and influence the working people . In time the cult of the Olympian gods became the official religion of the Greek polises , sanctifying the class suppression of the slaves and poor labourers . The masses , dissatisfied with their lack of civil rights , often countered the official religion by inaugurating cults of their own patron gods . Such , for instance , was the cult of Dionisius , patron of the tiller , in whose honour feasts and celebrations were held . This religious dissention can be considered the prototype of all later religious heresies .

By the 6th century B.C. more or less similar religious beliefs were held in common in all regions inhabited by the Greeks . These beliefs formed the basis of the Olympian religion , so called after Mount Olympus which was believed to be the home of the Gods , headed by Zeus . The Olympian religion was not connected with any organised religious body , dogma or ritual . The temples of the gods , though of definite significance in the religious lives of the people , did not , how ever , form a single system ; likewise , there was no special strata of religious attendants , no high priests . When necessary sary , persons chosen by the popular assembly carried out various religious functions . By making the gods human , the Olympian religion was able to penetrate deep into the masses and influence the working people . In time the cult of the Olympian gods became the official religion of the Greek polises , sanctifying the class suppression of the slaves and poor labourers . The masses , dissatisfied with their lack of civil rights , often countered the official religion by inaugurating cults of their own patron gods . Such , for instance , was the cult of Dionisius , patron of the tiller , in whose honour feasts and celebrations were held . This religious dissention can be considered the prototype of all later religious heresies .