維摩經玄疏 5.108

5.108

問曰：共不思議者，下地思不能知上地，上地名不思議；上地思能知下地，下地名思議耶？

Question: Regarding the shared inconceivable, the deliberation of a lower ground cannot know a higher ground, so the higher ground is called inconceivable; the deliberation of a higher ground can know a lower ground, so the lower ground is called conceivable, is it not?