In 2006, Italian anthropologist Augusto Cacopardo went to NW Pakistan to study the Winter Solstice festivities of the Kalasha, the last remaining polytheists of the Hindu Kush.
Of all the Indo-European-speaking peoples, the Kalasha are the only ones whose religion has never been either stamped out, or subsumed into one of the Big Name religions. They are as close as we will ever get to the living paganism of the European ancestors.
After the purifications, the sacrifices, the sacred dances, the torch-race, and the traditional (and well-omened) sexual banter ("Your scrotum is so hairy you could weave a pair of leggings from the wool!"), came the most sacred part of the entire month-long Winter Solstice celebration. Cacopardo was permitted to witness, but not to record, it. He could see, but not hear, what was happening.
This is what he saw. A very old man, the custodian of the ghach, the festival's secret and most sacred prayer, known only to a very few, covered his head and face with his mantle and recited the sacred formula. As he did so, he held in his hand a plant which, in the dark, Cacopardo could not see clearly.
"What's the plant that he's holding?" he asked the man standing next to him.
The man explained that it was zaróri, a very sacred and pure plant that had to be brought from another valley because it did not grow locally. It would also be used, he added, in the holiday's closing ceremony the next day.
At the ritual the following day, Cacopardo managed to get a good look at the zaróri.