We can compare the Buddha’s method with that of parents who raise their children with tender loving care. Most of the time, the children are not aware of how much is being done for them. They take their parents’ love for granted. Often they fully appreciate all that their parents have done for them only after the parents have died. Then they wish they had displayed more gratitude when they had the chance. The parents, on the other hand, must be careful, and not give their children everything they ask for. Pampered children can quickly become spoiled and helpless. Their parents will not be able to care for them forever.

The narrative … told by the four sravakas is called the “Parable of the Rich Man and His Poor Son.” As we can see from what they have said, the Lesser Vehicle which they had been following stressed escape from this world of sorrows into a pure world of contemplation. Its concept of enlightenment was also passive. It concluded that “nothing is different from anything else,” and “there is nothing more to seek.” This view rejected the reality of this world and the necessity of working to change it. The Great Vehicle, on the other hand, interpreted the same doctrine [that nothing is substantial] positively as becoming a buddha in this world and transforming it into a buddha-world. Enlightenment is to be achieved within the turmoil of our daily life, not in silent seclusion. The four “hearers” now realize that they, too, have obtained the wonderful law of the Great Vehicle and have departed from the passivity of the Lesser Vehicle.

The Lotus Sutra contains seven parables, three of which are best known. The first is the “Parable of the Burning House of the Triple World” in Chapter Three. The second is the “Parable of the Rich Man and His Poor Son” in Chapter Four. The “Parable of the Physician and His Children” is presented in Chapter Sixteen. These three parables allegorically show the relationship between the Buddha and living beings by presenting a parental relationship. That is, faith in the Buddha is similar to the faith of a child in his father; and the Buddha’s compassion toward living beings is like a father’s love for his children. In other words, natural feelings drawn from the norms of everyday life eventually lead us toward faith in the Buddha.

We can come to faith only by encountering the absolute Buddha and believing his words. This is an act beyond the working of our knowledge. In Chapter Two, the Buddha says, “Sariputra, know this! The Buddhas do not speak differently.” The Buddhas speak truth. We can recognize that truth even when it is beyond our full understanding.

On the other hand, this does not mean that we should believe blindly. There is a Japanese saying that “even the head of a sardine seems blessed if you have faith in it.” This is not what we mean by faith. We can maintain a belief that is inspired by the experience of something beyond our ordinary capacities. We can evaluate it by means of our intellect and reason, and form our own mental attitudes. The title of Chapter Four, “Understanding by Faith,” refers to this process of the formation of our own psychological attitudes.

In Chapters One and Two, Sakyamuni firmly declared that the true teaching of the Buddha is the One Vehicle of the Lotus Sutra. He urged us to believe and accept it from the bottom of our hearts. In Chapter 4, he unveils how we can believe, accept, and understand it properly. In the previous chapters, Sariputra had been the principal direct listener to Sakyamuni’s preaching. Here his place is taken by four other important “hearers.” They are Subhuti, Maha-Katyayana, Maha-Kasyapa, and Maha-Maudgalyayana. [Maha means “great” in Sanskrit.]

The studies conducted over so many centuries made possible a deeper understanding of the Lotus Sutra, and methodological standards for its interpretation were established. One example is called Kamon. It is a classification of the twenty-eight chapters into several sets for a systematic explanation of their meaning.

The major Kamon is the “Three Parts of Each of the Two Divisions of the Lotus Sutra” which was established by Great Master Chih-i. Most commentators since his time have accepted his guidelines. …

[T]he “Three Parts of Each of the Two Divisions of the Lotus Sutra” refers to the division of the Sutra into two main sections: the first half, consisting of Chapters One through Fourteen, and the second half, consisting of Chapters Fifteen through Twenty-eight. Kamon gives a detailed explanation of the reason for this division. The first half is named Shakumon, literally “imprinted gate.” Its main purpose is to teach how “hearers” and Pratyekabuddhas can attain Buddhahood in the One Vehicle. The second half is called Hommon, which means “Primal Gate” or “Primal Mystery.” This part reveals Sakyamuni to be the infinite, absolute Buddha, the Buddha who attained enlightenment in the remotest past but still leads living beings in the present. These two points are considered the fundamental ideas of the Lotus Sutra.

[W]hy is Chapter Four called “Understanding by Faith?” This refers to the mental attitude of accepting faith. Faith appears in an honest heart. Neither logic nor reason can awaken faith in us. Faith grows beyond reason when we encounter someone beyond our capacities, or when we unexpectedly touch something absolute in our lives or in the cosmos. In Chapter Three, the sutra maintains, “They will be able to follow this sutra only because they believe my words, not because of their own wisdom” (p. 80).

The First Noble Truth is, “All is suffering.” Suffering here refers to the situation in which we cannot meet our desires or wishes. This truth implies that all life is suffering as long as we are dominated by greed, ignorance of the law, and hostility towards others. Our desires can never be fully satisfied.

The Second Noble Truth states, “The cause of sufferings is ignorance.” This means that suffering in life is caused by ignorance arising from our instincts, such as thirst, hunger, sex, and fear.

The Third Noble Truth states, “The extinction of ignorance is nirvana.” The sravakas took this to mean that ignorance could be extinguished only by quenching human desires.

The Fourth Noble Truth maintains, “The Way to Nirvana is by practicing the Eightfold Path.” The Eightfold Path consists of (1) right views (a correct understanding of the Four Noble Truths), (2) right thoughts (the ability to reflect on the Four Truths), (3) right speech (speaking only the truth and words of kindness), (4) right deeds (proper acts—that is, morality), (5) right livelihood (making a living without harming others), (6) right effort (or exertion), (7) right memory (memory of things beneficial to enlightenment), and (8) right concentration of mind (correct meditation).

The Twelve Interdependent Causes are: (1) ignorance, (2) predisposition, (3) consciousness, (4) “name and form” (an entity of mind and body), (5) the six sense-organs, (6) contact (touch), (7) sensation, (8) craving, (9) grasping, (10) existence, (11) birth, and (12) aging and death. (Since death results in “ignorance,” the whole cycle begins all over again.) Each cause is dependent on its predecessor. For instance, the first cause, ignorance, is the origin of all illusions. At the same time, it generates the second action of predisposition, which induces the third factor of consciousness (the first consciousness after conception takes place), which further produces the fourth cause of “name and form,” and so on. Since the world of illusions is gradually formed through this chain of actions, we will be able to attain enlightenment by eliminating these causes one by one, starting with the last cause.

It is generally said that the teaching of the Four Noble Truths is for sravakas, and that of the Twelve Causes is for Pratyekabuddhas.
Introduction to the Lotus Sutra

[In Chapter 4, Understanding by Faith] Sakyamuni predicted the enlightenment of the four great disciples just as he had with Sariputra. Chapters Three (“A Parable”), Four (“Understanding by Faith”), and Five (“The Simile of Herbs”) had used parables to clarify the basic lesson from Chapter Two (“Expedients”) – namely, all teachings are only expedients leading to the One Buddha Vehicle. The parables were followed up with assurances of future Buddhahood. In the next chapter, “The Parable of the Magic City,” he employs a different teaching method, showing how events in the remote past can affect the present and the future. This is called teaching by affinities with the past. These three methods – doctrinal teaching, parables, and affinities – are known as the Three Stages of Preaching. All three are designed to make the basic lesson easy for us to understand.