法華論疏 2.431

2.431

The sūtra speaks of "one great cause and condition"; the treatise clarifies that cause and condition is the reason, and the reason is the meaning. Now, it is by relying on this meaning that [the Buddhas] appear in the world; hence it says "what meaning it relies on." Furthermore, "what meaning it relies on" is stated because it relies on the four meanings of opening, revealing, awakening, and entering. Furthermore, by contrast with the above three vehicles having words but no reality while the One Vehicle has words and has reality, it says "what meaning it relies on."