法華義疏 4.128

4.128

有所得若決定性者不能生無所得，良由諸法無決定性故，值佛菩薩悟此有所得本無所有便生無所得也。

If that which involves apprehension had a determined nature, it could not generate that which is without apprehension; but precisely because all dharmas have no determined nature, upon encountering buddhas and bodhisattvas and awakening to the fact that this apprehension is originally non-existent, one then generates that which is without apprehension.