The Yoruba egungun and many other festivals like it are performed in the exact same way that the ancestors of the participants performed it. That is to say the ritual is completely improvised and transformed. Two performers could be retelling the same origin myth while their enactments of the myth would be entirely different. The importance of this is the idea of continuous transformation. As alluded to earlier, this continuity and circularity is in great part due to the cosmogony of the Yoruba.
Transformation is the other part of the fundamental orisa ideology.
For the Yoruba, these rituals are more than celebrations. They are journeys from one realm of knowledge to another. The importance of this cannot be stressed enough as the notion of life and everything one does as a journey is at the heart of all Yoruba thinking. This is a lifelong ritual that, in essence, is focused on understanding ones mind and body. Of course, this divination is not a prediction of the childs future and is only meant to be a guide to provide the child with the best possible future.