首楞嚴義疏注經 4.334

4.334

設若我教有自然者，豈存生滅名為自然？今汝所明自然心生、生滅心滅，此亦生滅，何名自然？夫自然者必無生滅，故云無生滅者名為自然。

Even if there were spontaneity in my teaching, how could it preserve arising and cessation and be called spontaneity? Now, what you explain as the spontaneous mind arising and the mind of arising and cessation ceasing is also arising and cessation; how could it be called spontaneity? Spontaneity necessarily lacks arising and cessation; therefore it is said: 'That which is without arising and cessation is called spontaneity.'