四教義 10.23

10.23

次如虛空三昧破無想天有者，此是外道天，實非無想而計為無想涅槃，如小兒夢尿，菩薩為破是有故以三諦空破無想，故言如虛空三昧。

Next, the space-like samādhi destroys existence in the heaven of non-conception. This is a heaven of non-Buddhists, where it is truly not non-conception, yet they presume it to be the nirvāṇa of non-conception, like a small child dreaming of urinating. In order to destroy this existence, the bodhisattva uses the emptiness of the three truths to destroy non-conception, and thus it is called the space-like samādhi.