大乘起信論廣釋卷第三．四．五 4.138

4.138

論。以說不究竟至妄取涅槃　釋曰。此正明執相也。以二乘教唯明人空。二乘依之但離人我。由其未顯蘊體。亦空法無我理說未究。故彼二乘者未亡法執見有五陰生滅實法。故悕生死妄取涅槃。其由夢虎而生嫌見空花而自樂。

[Treatise:] Because the teaching was not exhaustive, [seeing that the five skandhas are dharmas of arising and ceasing, they fear saṃsāra and] falsely grasp nirvāṇa—
[Commentary:] "Explication": This directly explains the characteristic of attachment. Because the teaching of the two vehicles only clarifies the emptiness of persons, those of the two vehicles rely on it merely to be free from a personal self. Since it did not yet reveal that the substance of the aggregates is also empty, the principle of dharma-selflessness was not exhaustively taught. Therefore, those of the two vehicles, not having eliminated attachment to dharmas, see the five skandhas as real dharmas of arising and ceasing; hence, fearing saṃsāra, they falsely grasp nirvāṇa. This is like fearing a tiger seen in a dream or delighting in flowers in the sky.