法華玄義釋籤 4.21

4.21

次人天中為二：先與四趣辨異，次正釋。釋中言「自然」者，此言通用何必外計，即任運之異名耳。因必尅果之相也。委以四趣意，例之可識。

Next, regarding humans and devas, there are two parts: first, distinguishing the differences from the four destinies; next, the primary explanation. In the explanation, the word 'spontaneous' (ziran) is commonly used; why must it refer to non-Buddhist views? It is merely an alternative name for 'naturally occurring' (renyun). It is the mark of cause necessarily clinching the fruit. By elaborating according to the intent of the four destinies, it can be understood by analogy.