This sign was used even for worshipping the gods. Job, in his parable (Chap. xxxi.), which is perhaps the oldest of known books, says that he has not worshipped the sun and the moon like the other Arabs, that he has not carried his hand to his mouth as he looked at the stars.
In our Occident nothing remains of this ancient custom but the puerile and genteel civility that is still taught to children in some small towns, of kissing their right hands when someone has given them some sweets.
It was a horrible thing to betray with a kiss; it was that that made Cæsar's assassination still more hateful. We know all about Judas' kisses; they have become proverbial.
Joab, one of David's captains, being very jealous of Amasa, another captain, says to him (2 Sam. xx. 9): "Art thou in health, my brother? And he took Amasa by the beard with the right hand to kiss him," and with his other hand drew his sword and "smote him therewith in the fifth rib, and shed out his bowels on the ground."
No other kiss is to be found in the other fairly frequent assassinations which were committed among the Jews, unless it be perhaps the kisses which Judith gave to the captain Holophernes, before cutting off his head while he was in bed asleep; but no mention is made of them, and the thing is merely probable.
In one of Shakespeare's tragedies called "Othello," this Othello, who is a black, gives two kisses to his wife before strangling her. That seems abominable to honourable people; but Shakespeare's partisans say it is beautifully natural, particularly in a black.
When Giovanni Galeas Sforza was assassinated in Milan Cathedral, on St. Stephen's day, the two Medici in the Reparata church; Admiral Coligny, the Prince of Orange, the Maréchal d'Ancre, the brothers Witt, and so many others; at least they were not kissed.
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, ἄγιον φίλημα. 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.
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.