The punishment for Prometheus stealing fire from the Gods and gifting it to humanity, was to be chained to a rock and having an eagle feed on his liver which would regrow the next day.
For what it's worth, Prometheus was a Titan, and Titan was immortal, so his liver regrowing the next day wasn't really that special. If eagle fed on his heart, or lungs, they would've regrown too.
The Greeks chose liver because it symbolized the defiance Prometheus had against gods.
There are a bunch of Japanese words (including a several loanwords from Chinese) that use the liver / gallbladder metaphorically for courage. Both derive from associations between the humours and personality / behavior. I have no idea, however, why both Eastern and Western naive psychology associate gall with, well, gall.
The Greeks did get to India. <a href="https://en.wikipedia.org/wiki/Greco-Buddhist_art" rel="nofollow">https://en.wikipedia.org/wiki/Greco-Buddhist_art
You left out the important part, that Greek influence made it all the way to Japan, in some cases identifiably intact: "[The Greek wind god] Boreas became the Japanese wind god Fujin through the Greco-Buddhist Wardo/Oado and Chinese Feng Bo/Feng Po ("Uncle Wind"; among various other names). The mother deity Hariti [Kishimojin in Japan] was inspired by Tyche."
vconnor · · focus · HN ↗
bheadmaster · · focus · HN ↗
The Greeks chose liver because it symbolized the defiance Prometheus had against gods.
seizethecheese · · focus · HN ↗
jephs · · focus · HN ↗
card_zero · · focus · HN ↗
wahern · · focus · HN ↗