以百年方浮出水面一次的盲龜偶遇獨孔浮木、頸穿其中的機率，比喻墮入惡趣的愚人再得人身之難得的一部經。

A discourse teaching that it is more likely for a blind turtle, surfacing only once every hundred years, to put its neck through the single hole of a floating yoke than for a fool who has fallen into the lower realms to be reborn as a human being.