Indonesia has diverse cultures. One of them belongs to tribal Kemak in Belu district, Atambua, East Nusa Tenggara. The tradition is called Rai rate. In this traditional ceremony, people put food on the tombs of the ancestor or ancestors who have not been baptized. Since most of Kemak people have embraced Christianity, the practice of Rai rate is deemed incompatible with Christian teachings that do not recognize the connection between the dead with the living. Yet despite this fact, Rai rate tradition still survives today because of the important values that this practice has to offer. Rai rate is a kind of ritual that requires each person in every family to perform it. The failure to carry out the tradition would be a disaster for the family. However, Rai rate also provides an opportunity for Kemak people to learn about responsibility and sharing among fellow members of the tribe or people outside the tribe. And most importantly, this tradition teaches Kemak people about the value of unity and oneness among them.
Key words: Ritual, Rai rate, Kemak Society, Christ and Culture, Tradition Ceremony, Ancestors, Grave, Ritual Offering.