A great part of the study of ancient religion is a study of ritual, and it is interesting to survey the Mediterranean area, so as to discern similarities or divergencies in the forms of religious service. Everywhere we observe the blood-sacrifice of animals, and very frequently the harmless offering of fruits and cereals, and now one, now the other, in Greece as elsewhere, was regarded as the more pious. The former is of the higher interest, for certain ideas which have been constructive of higher religions--our own, for example--have grown out of it. At first sight the animal oblation seems everywhere much the same in character and significance. The sacrificial ritual of Leviticus does not differ in any essential trait from that which commended itself to the Greeks and the other peoples of these lands. Certain animals are everywhere offered, at times as a free and cheerful gift, at other times as an atonement to expiate sin and to deprecate wrath. Certain other animals are tabooed, for reasons that may repay searching out. In most regions we have evidence of the practice of human sacrifice, either as an established system or as an occasional expedient. The motives that prompted it present an important and intricate question to the modern inquirer. The two nations that grew to abhor it and to protest against it were the Hebrew and the Greek, though the latter did not wholly escape the taint {25} of it; for he had inherited the practice from his ancestral past, and he found it indigenous in the lands he conquered. Repellent as the rite may be, it much concerns the study of the religions of the cultured races. Now, an interesting theory concerning sacrifice was expounded and brought into prominent discussion by Professor Robertson Smith in his _Religion of the Semites_, and in an earlier article in the _Encyclopædia Britannica_--namely, that a certain type of ancient sacrifice was a mystic sacramental communion, the worshipper partaking of some sacred food or drink in which the spirit of the deity was temporarily lodged. This mystic act, of which there is no clear trace in the Old Testament, is reported from Egypt,[25.1] and it appears to have been part of the Attis ritual of Phrygia. We find doubtful traces of it in the Eleusinian and Samothracian mysteries; also a glimpse of it here and there in the public religion of Hellas. But it is best attested as a potent force in the Dionysiac worship, especially in a certain savage ritual that we may call Thracian, but also in the refined and Hellenised service as well.