大方廣佛華嚴經搜玄分齊通智方軌 4.18

4.18

Second, the obstacles to be eliminated: according to the Daśabhūmivyākhyāna, it is the obstacle of being unable to skillfully benefit sentient beings; according to the Mahāyānasaṃgraha, it is [the obstacle of] not acting spontaneously without effort in matters of benefiting sentient beings. Furthermore, there are two kinds of ignorance: 1. the obstacle to self-benefit consisting of [inability regarding] the immeasurable correct preaching of the Dharma, the immeasurable names, phrases, and syllables that are difficult to answer, and the dhāraṇī of skillful and unimpeded speech; 2. the obstacle to benefiting others consisting of resolving doubts and generating understanding by relying on the four unhindered knowledges. There are two karmic obstacles and one retributive obstacle: saṃsāra in existence.