大般涅槃經義記 3.281

3.281

自下第三終為開示，彼聞悟解。「即於其家掘出金藏」喻佛開示，如來今於眾生身中開示佛性名於其家掘出金藏。「女人見」下喻明眾生因說悟解，尋說解性名為「見已」，解性釋心故云「生喜」，妄中見真故「生奇想」，解法敬佛名「宗是人」。

From here below is the third part: finally revealing it to them, and they, upon hearing it, awaken and understand. 'Immediately in her house dug out the gold store' is a simile for the Buddha revealing it: the Tathāgata now revealing the buddha-nature within the bodies of sentient beings is called digging out the gold store in her house. From 'When the woman saw' downward is a simile clarifying that sentient beings, through the teaching, awaken and understand: following the teaching to understand the nature is called 'having seen it'; understanding the nature and liberating the mind, hence it says 'gave rise to joy'; seeing the true within the false, hence 'conceived an extraordinary thought'; understanding the Dharma and revering the Buddha, hence 'honoured this person.'