大乘入道次第開決 1.170

1.170

隨所化宜覆相談也者。謂據實理一切諸法非空不空。以一切法皆有三性不相離故。然阿含經隨所化者宜聞不空。佛即隱覆遍計空相。偏就依圓說有諸法。大般若經隨所化人宜聞不有。佛即隱覆依圓有相。偏就計執說諸法空。是故皆名覆相談也。

Regarding 'Speaking with concealed marks in accordance with what is suitable for those being transformed': That is to say, according to the real principle, all dharmas are neither empty nor non-empty, because all dharmas possess the three natures and are inseparable from them. However, in the Āgama sūtras, in accordance with the fact that those being transformed were suited to hear of non-emptiness, the Buddha concealed the empty mark of the imagined nature and spoke of the existence of dharmas by leaning toward the dependent and consummate natures. In the Mahāprajñāpāramitā-sūtra, in accordance with the fact that those being transformed were suited to hear of non-existence, the Buddha concealed the existent marks of the dependent and consummate natures and spoke of the emptiness of all dharmas by leaning toward the imagined nature. Therefore, both are called speaking with concealed marks.