仁王經疏 2.123

2.123

Question: The sūtra speaks of nine truths; why does it say eight? Answer: The intention of the sūtra is to reveal the excellence of wondrous awakening, so it divides them into two truths; the intention of the treatise is to clarify the commonality with the Mahāyāna, so it combines them into a single count. The preceding seven truths are common to both the Great and Small [Vehicles]; therefore, this sūtra now speaks on the basis of eight truths.