三彌勒經疏 1.9

1.9

Question: What is their meaning regarding sudden and gradual? Answer: There are two explanations. One says: The Ascent Sūtra is subsumed under the sudden teaching, because the inconceivable dhāraṇīs, the śūraṅgamasamādhi, and the like are not attainable by the two vehicles. Another says: this sūtra is subsumed under the gradual teaching, because humans, devas, and the eight classes of beings vow to be born in that heaven. For now, the latter explanation is superior, because the bhikṣus and others all receive the benefit of conversion. The meaning of the other two sūtras may be regarded similarly.