There was among the ancients I know not what of symbolic and sacred attached to the kiss, since one kissed the statues of the gods and their beards, when the sculptors had shown them with a beard. Initiates kissed each other at the mysteries of Ceres, as a sign of concord.

The early Christians, men and women, kissed each other on the mouth at their _agapæ_. This word signified "love-feast." They gave each other the holy kiss, the kiss of peace, the kiss of brother and sister, +agion philêma+. This custom lasted for more than four centuries, and was abolished at last on account of its consequences. It was these kisses of peace, these agapæ of love, these names of "brother" and "sister," that long drew to the little-known Christians, those imputations of debauchery with which the priests of Jupiter and the priestesses of Vesta charged them. You see in Petronius, and in other profane authors, that the libertines called themselves "brother" and "sister." It was thought that among the Christians the same names signified the same infamies. They were innocent accomplices in spreading these accusations over the Roman empire.

Voltaire's Philosophical Dictionary — Part 102

There were in the beginning seventeen different Christian societies, just as there were nine among the Jews, including the two kinds of Samaritans. The societies which flattered themselves at being the most orthodox accused the others of the most inconceivable obscenities. The term of "gnostic," which was at first so honourable, signifying "learned," "enlightened," "pure," became a term of horror and scorn, a reproach of heresy. Saint Epiphanius, in the third century, claimed that they used first to tickle each other, the men and the women; that then they gave each other very immodest kisses, and that they judged the degree of their faith by the voluptuousness of these kisses; that the husband said to his wife, in presenting a young initiate to her: "Have an agape with my brother," and that they had an agape.

Voltaire's Philosophical Dictionary — Part 102

We do not dare repeat here, in the chaste French tongue,[11] what Saint Epiphanius adds in Greek (Epiphanius, _contra hæres_, lib. I., vol. ii). We will say merely that perhaps this saint was somewhat imposed upon; that he allowed himself to be too carried away by zeal, and that all heretics are not hideous debauchees.

Voltaire's Philosophical Dictionary — Part 102