妙法蓮華經玄贊 6.96

6.96

贊曰。第二釋成父志也。長者大富，有為、無為庫藏眾多，周給一國猶用不盡，何況諸子。故以珍實而作大車，教之脩習果滿生故。總而言之，一切種智無漏五薀為此車相。捨無常色獲得常色，受、想、行、識亦如是故。若說真如為此車體，即是寶所，云何言作？化城教設，亦可說言我所化作，豈說寶所亦是作也？牛車既作，明體菩提。

Commentary: The second part explains the fulfillment of the father's intent. The elder is immensely rich, possessing numerous conditioned and unconditioned treasuries, enough to provide for an entire state without running out, let alone for his children. Therefore, using precious realities, he made the great carts, so that by teaching them to cultivate, their fruition would be completely generated. Broadly speaking, the untainted five aggregates of omniscience constitute the characteristics of this cart. Casting off impermanent form, one attains permanent form; feeling, perception, formations, and consciousness are also like this. If tathatā were said to be the substance of this cart, that would be the jeweled place—how could it be said to be "made"? The conjured city is established as a teaching, and it may also be said "what I conjured"; how could the jeweled place be said to be made as well? Since the ox cart is made, it is clear its substance is bodhi.