Words like kangaroo and Dreamtime are not aboriginal words.
Thus sleepwalking materialist missionaries and researchers have lttle hope of understanding gnostic aboriginals and explaining them to white culture. This Elkin fellow succeeeds fairly well via comparison with spiritual adepts of Tibet and India. Bottom of the second page an aboriginal elder describes the plight of the white man. He just "knows"
An example of the nearly insuperable language barrier is given at the link. They try to explain just one word "Dreamtime"