首楞嚴義疏注經 9.90

9.90

此正明迴心也。若於有頂禪中，故云捨心。發無漏智，頓斷上界四地三十六品俱生煩惱，便證無學。仍又迴心向大乘道，更不入於空、識等處，以無上地惑故。然迴心入大有深有淺，但隨破惑有深淺耳。此類仍是樂慧那含，故得慧光圓通，便出塵界。

This directly explains turning the mind. Because it is within the dhyāna of the Summit of Existence, it is called the 'mind of renunciation'. Bringing forth uncontaminated wisdom, one頓breaks through the thirty-six grades of innately operative afflictions of the four levels of the upper realm, and then realizes the stage of non-learning. Yet one also turns one's mind toward the Mahāyāna path, and no longer enters into the spheres of space, consciousness, and so forth, because the defilements of the upper levels no longer exist. However, turning the mind to enter the Great [Vehicle] has depth and shallowness, solely in accordance with the depth or shallowness of breaking through defilements. This class consists still of anāgāmins who delight in wisdom; hence they attain the light of wisdom with perfect penetration and then depart from the dust-realms.