What was the significance of Thich Quang Duc's heart in his self-immolation protest?

Thich Quang Duc's self-immolation protest in 1963 was a powerful act of defiance against the South Vietnamese government's suppression of Buddhism. His heart, which remained intact after his body was consumed by flames, was seen as a symbol of his unwavering commitment to his beliefs and the strength of his protest. This event brought international attention to the plight of Buddhists in Vietnam and contributed to the eventual downfall of the oppressive regime.