佛遺教經論疏節要 1.445

1.445

[Supplementary note] There are two reasons for "no benefit": first, the Buddhas abide in the world only to preach the Dharma and benefit living beings; since the Dharma is already sufficient, there is no benefit. Second, if the Buddha were to abide for a long time, sentient beings would not generate the thought that he is difficult to encounter; hence there is no benefit.