+192+. In the cases mentioned above, the dead person is generally regarded as dangerous--to be feared and appeased. Among some tribes, indeed, precautions are taken to prevent his coming back to his house. Very generally the presence of the corpse is held to cause a certain pollution.[356] There is, however, another side to the attitude toward the dead. As he is regarded as powerful, parts of his body are preserved as amulets; wives wear parts of the bones of the dead husband, and the skulls of the deceased are supposed to be especially powerful, in some cases to give oracular responses.[357] +193+. In general, early burial ceremonies appear to be designed to assure the comfort of the deceased in the other world with a view to securing his friendship and aid for the members of his family and clan in this life. As he is of the nature of a divine person, the ceremonies in question are naturally religious. Socially they are effective in binding the members of a community together--a large sense of solidarity is produced by the communal recognition of kinship with the dead. Special stress is laid on this conception in China.[358] CEREMONIES OF PURIFICATION AND CONSECRATION[359] +194+. The essence of religion is a helpful relation to the supernatural, but in early stages of culture man frequently finds himself exposed to conditions, either resident in himself or induced from without, that destroy this relation and disqualify him for the performance of sacred acts. The result is a state of ritual impurity or uncleanness, conceived of at first as purely physical, but tending to become gradually moralized. The removal of the disqualification constitutes purification; the positive preparation for the performance of a sacred act constitutes consecration; the two procedures represent two sides of the same idea, and they are related in a general way to ceremonies of initiation and atonement.