Aṉangu believe they are directly descended from these ancestral beings. They believe that their ancestors live within the land. Many places around the park are sacred because of this. They are bonded to the land in a kind of kinship, because the main principle of "tjukurpa" is that people and the land are connected. "Tjukurpa" is an oral tradition (not written down). It makes up the Aṉangu belief system, moral code and legal code. It is passed on through story, song, dance and art.