摩訶止觀 10.20

10.20

若於觀支計必有我，而不在身見四句中，亦不在三世、無為四句中，而在第五不可說藏中。發此見時，心解明利，能問、能答，神俊快捷，難與當鋒。破他成己，決不可移。當知是犢子見發也。

If through the contemplation factor one asserts that there must be a self, which is neither within the four propositions of personality view nor within the four propositions of the three times and the unconditioned, but exists in the fifth ineffable treasury: when this view arises, the understanding mind is luminous and sharp, capable of questioning and answering, remarkably swift and agile, difficult to meet head-on. Refuting others and establishing oneself, it is utterly unshakeable. One should know that this is the arising of the Vātsīputrīya view.