I stumbled over this screenplay by Ursula Le Guin. It's a science fiction story from 1985, about an anthropologist traveller from a high-science civilisation visiting a Bronze Age society.  And about war, and kingship, and walking away, and why it might not be worth going to heaven, even if you do take your dog with you. 

"Spoken with the heart against it, any word is a lie. I never lied till I stood there on the temple steps. I never hoped to know what the truth is, but I thought I could hold to the piece of it that had been given me. Not the sun, not the moon, only a little rock, a little stone, my truth. You drop it and it’s gone. How can you tell it from all the other stones, all the pebbles, the grains of sand on all the beaches…."