菩薩瓔珞本業經 1.63

1.63

"Buddha-son! Tenth is transforming all sentient beings with sovereign wisdom, that is to say, the Middle Way of ultimate truth. Prajñā abides in the middle, contemplating and penetrating all phenomena as non-dual; its contemplative wisdom progresses gradually into the noble stages, and so it is called the contemplation of the similitude of ultimate truth, not the contemplation of the true Middle Way of ultimate truth. As for correct contemplation: from the first ground upwards, there are three minds of contemplation that enter all grounds. The three contemplations are: the contemplation of the two truths entering emptiness from provisional designations, and the contemplation of equality entering provisional designations from emptiness. These two contemplations are the path of expedient means. Relying on these two contemplations of emptiness, one can enter the contemplation of the Middle Way of ultimate truth, illuminating both truths simultaneously while thought after thought is extinguished in stillness, entering into the dharma-stream of the first ground; this is called the noble lineage of the mahāsattva, because one practices the Middle Way within signless phenomena without duality.