大乘起信論略述 2.146

2.146

論。又是菩薩至自涅槃故　述曰。此難其實行也。一發心後離怯等者。於下不墮了人法空。何有怯弱。進成實行不墮二乘。若聞等者。於上不怯。得涅槃者。即成佛也。信知已下總釋所以。既知諸法本來涅槃。豈同二乘厭苦欣滅。

[Treatise:] Moreover, this bodhisattva... naturally nirvāṇa.
[Exposition:] This praises their real practice. 'Once generating the aspiration, being free from cowardice,' and so forth: toward what is below, they do not fall; completely understanding the emptiness of persons and dharmas, what cowardice could there be? Advancing to accomplish real practice, they do not fall to the two vehicles. 'If hearing,' and so forth: toward what is above, they are not timid. 'Attaining nirvāṇa' means attaining buddhahood. 'Knowing through faith,' onward, generally explains the reason. Since they already know that all dharmas are originally nirvāṇa, how could they be like the two vehicles, reviling suffering and delighting in extinction?