extremely rare event; once-in-a-lifetime chance
Buddhist idiomatic expression likening the rarity of encountering the Dharma to a blind turtle surfacing through a floating log. Used metaphorically for any exceedingly unlikely occurrence or precious opportunity.
この出会いは盲亀の浮木のようなものだ。
This encounter is like a once-in-a-lifetime chance.
The odds of winning the lottery are compared to a blind turtle finding a floating log.