大般涅槃經義記 9.252

9.252

下約論性。「說諸眾生悉有佛性」令人趣求捨離放逸，稱己化意名如意語。

Below, the nature is discussed with reference [to it]: "expounding that all sentient beings possess the buddha-nature" causes people to aspire and seek, abandoning heedlessness, matching his intention to transform, hence called speech conforming to intent.