唯有如来得般涅槃，一切所应断过皆悉断灭，成就第一清净；阿罗汉、辟支佛有余过，非第一清净，言得涅槃者是佛方便。
《胜鬘师子吼一乘大方便方广经》
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only the Tathagatas attain parinirvana, as all the faults that should be removed have been eliminated to achieve the ultimate purity. Arhats and pratyekabuddhas still have their remaining faults, and hence they have not achieved the ultimate purity. Saying that they attain nirvana is an expedient of the Buddha.
The Lion's Roar of Queen Srimala, the single-vehicle great expedience, the corrective and extensive Sutra
[Srimaladevi Simhanada Sutra]
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阿罗汉、辟支佛都还有习气种及上烦恼等过失，他们并不是第一清净，他们连菩萨们的证境都无法达到；因此他们所得到的涅槃，都是佛陀施设方便而说已经证得涅槃，其实他们并没有真的证得涅槃。为什么诸佛可以是究竟的涅槃，而阿罗汉们不行？因为阿罗汉心中仍有恐怖、仍有畏惧，仍有极多的无明存在，所以对他们所不知的部分，仍然会有妄想生起，那就不是究竟的圆满与寂静。
《胜鬘经讲记》第二辑，页51
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Arhats and pratyekabuddhas have not achieved the ultimate purity because they still harbor such faults as habitual seeds and advanced vexations; they cannot even reach the realization state of bodhisattvas. Therefore, it is just the Buddha's expedient teaching to say that they have realized nirvana. They have not really realized nirvana. Why can all Buddhas attain the ultimate nirvana but not arhats? It is because arhats still have terror, fear and plenty of ignorance that will induce false imagination on what they do not know. Therefore, the state which they attain is neither ultimately perfect nor Tranquil.
A Discourse on the Srimaladevi Simhanada Sutra,Vol. 2, p. 51
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