In Chapter 2, “Expedients,” Śākyamuni Buddha finally begins to clarify the true purpose he had been concealing all this time. This is “Opening the three vehicles to reveal the One Vehicle.” Before this he had taught that there was an absolute dividing line between bodhisattvas and the other two groups. However, this was an expedient to lead the śrāvakas and pratyekabuddhas in the right direction. For the Buddha’s purpose, all the various teachings up to that point had been part of his plan to lead all people to become buddhas, that is, the teaching of the “One Buddha Vehicle.” No matter how they appeared superficially, no matter how they were received by the listener, from the point of view of the teacher Śākyamuni Buddha, all the teachings up to that point had been in reality none other than the teachings of the One Vehicle. Following his own vow, Śākyamuni Buddha himself had worked consistently to help all people achieve buddhahood.

Śāriputra! There is not a second vehicle in the worlds of the ten quarters. How can there be a third? … Therefore, the Buddhas divide the One Buddha-Vehicle into three as an expedient.

“Know this Śāriputra!
I once vowed that I would cause
All living beings to become
Exactly as I am.”

Now that this point had become clear, the śrāvakas and the pratyekabuddhas had to abandon the misunderstanding that they were following lesser vehicles. That is because Śākyamuni Buddha had been continuing to lead the two groups as bodhisattvas so that they could become buddhas.

“I say to you:
‘I will expound the teaching of the One Vehicle Only to Bodhisattvas.
There is no Śrāvaka among my disciples.’ “

Therefore, the two groups now came to realize that with the teaching of the One Vehicle as their guide, they could become bodhisattvas with the possibility of becoming buddhas.

Having thus described the distinction between the three groups as an expedient, Śākyamuni Buddha revealed the true one meaning of all his teachings. We call such unifying the separate meanings of all teachings “opening the three vehicles to reveal the One Vehicle.”

All the teachings after the “Expedients” chapter are called the “true Mahāyāna teachings.” This is because they clarify the true purpose of the Buddha by showing that anyone can become a buddha, and by showing the method for becoming a buddha.

Of the many śrāvakas, Śāriputra is said to be the wisest. The Buddha tells Śāriputra that the wisdom of the Buddhas is something beyond his understanding. That means that for all the śrāvakas and the pratyekabuddhas, the wisdom of the Buddhas is also beyond their understanding. The wisdom of the Buddhas attains the reality of all things, which cannot be put into words. This is because at the beginning of Chapter Two the Buddha says of all things, their appearances as such, their natures as such, their entities as such, etc. He only says, “as such,” because the reality of all things can be attained only by the buddhas.

Although the Buddha says this, buddhas do not monopolize the wisdom of the Buddhas. As Śākyamuni Buddha says at the beginning of Chapter Two, to convey to others the wisdom of the buddhas, which cannot be expressed in words, he has taught many things by mixing words, metaphors, similes, and tales of origin and fate. On the other hand, he emphasizes strongly that the various teachings which comprise the so-called “gate” to the wisdom of the buddhas are extremely difficult to understand, and therefore, the gate is difficult to enter.

[G]rand Master Tiāntái divides the Lotus Sūtra into two different patterns of kamon, “one sūtra, three sections” and “two gates, six sections.” …

First, consider “one sūtra, three sections.” This method of interpretation divides the Lotus Sūtra into an introduction, a main part, and a concluding section urging propagation of the sūtra. The introduction explains why the sūtra was taught and the necessity of the sūtra. The main part is the body, which contains the most important teachings of the sūtra. The concluding section teaches methods and merits and urges readers to spread the message of the sūtra.

Next, we consider “two gates, six sections.” This kamon divides the Lotus Sūtra into the Trace Gate, shakumon in Japanese, as the first half of the sūtra, and the Original Gate, honmon in Japanese, as the latter half of the sūtra. In The Trace Gate, Śākyamuni Buddha does not yet reveal his eternal nature, but appears as a being bound by limitations of time and space. The Original Gate reveals the eternal nature of the Buddha.

Shaku means a track, such as a deer track. It can be also mean a shadow. Therefore, the teachings of the Trace Gate are mere tracks or shadows, with the real Buddha still in hiding. On the other hand, the teachings in the Original Gate are the teachings of Buddha in his true state. In the “two gates, six sections” method of interpretation, the two “gates” of the Trace Gate and Original Gate are each divided into an introduction, a main part and a concluding section as explained regarding “one sūtra, three sections.”

In some cases the Lotus Sūtra is divided by the change in location of Śākyamuni Buddha’s teachings and the accompanying change in the lessons taught. From Chapter 1, “Introductory,” to the middle of Chapter 11, “Beholding the Stūpa of Treasures,” the Buddha is teaching on Mt. Sacred Eagle. This is referred to as the “Former Assembly on Mt. Sacred Eagle,” in Japanese zenryōzen-e. … From the middle of “Beholding Stupa of Treasures,” the assembly moves into space. This is called the “Assembly in Space,” in Japanese kokū-e. The Assembly in Space continues until Chapter 22, “Transmission.” Then from Chapter 23, “The Previous Life of Medicine-King Bodhisattva” to the final chapter, Chapter 28, “The Encouragement of Universal-Sage Bodhisattva,” the assembly returns to Mt. Sacred Eagle. This is called the “Latter Assembly on Mt. Sacred Eagle.” In this way, the Lotus Sūtra can be divided into three assemblies at two locations, and this method of division is called “two locations, three assemblies,” in Japanese nisho san-e.