法智遺編觀心二百問 1.102

1.102

問：四念處內、外二觀之後結歸心者，蓋捨旁從正、捨難從易，外觀破於內著，豈全不觀外耶？

Question: In the four smṛtyupasthānas, the concluding return to the mind after the two contemplations—internal and external—is merely abandoning the secondary to follow the primary, abandoning the difficult to follow the easy; since the external contemplation shatters internal clinging, could it entirely not contemplate the external?