Tientai's Sutra classification

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                          THE EIGHT-FOLD TEACHINGS 

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The great teacher T'ien T'ai of China (538-597) was able to penetrate
Shakyamuni's full intention in the sutras. Accordingly, T'ien T'ai divided
the sutras into categories on the basis of content. These categories are the
Eight-Fold Teachings and the Five Periods, and he used the Three Analogies to
elucidate them. 

The Eight-Fold Teachings are divided into: 

 
     1) the Doctrines of Conversion (including Hinayana, Shared, Distinct,
and Perfect Teachings), and 

     2) the Methods of Conversion (consisting of Sudden, Gradual, Secret, and
     Variable teachings). 

If we compare a sutra to medicine, then Doctrines of Conversion list the
contents, while Methods of Conversion explain how to use the medicine. . 

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Sudden Teachings are doctrines that a Buddha expounds in a direct, undiluted
manner. Directly after his enlightenment, without first assessing who would
or would not understand these teachings, Shakyamuni preached the Flower
Ornament (Kegon) Sutra as a Sudden Teaching to gauge his audience's capacity.
He expounded major aspects of the truth, and accomplished Bodhisattvas might
have had the capacity to recognize that truth and gain immediate entry into a
form of enlightenment. 

For those unable to comprehend the above-mentioned truth immediately,
Shakyamuni employed the Gradual Teachings to prepare them slowly for higher
teachings. 

Hearing a Secret Variable or Clear Variable Teaching, each person in an
audience learns something according to their capacity. In the case of Secret
Variable Teachings, the term "secret" is used because one cannot know what the
audience has grasped; "secret" does not indicate that teachings are "hidden".
When C!ear Variable Teachings are expounded, each listener can be sure that a
Hinayana practitioner will comprehend the teachings from a Hinayana
perspective and that a Mahayana practitioner will grasp them from a Mahayana
point of view. 

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                    THE FIVE PERIODS AND THREE ANALOGIES 

After establishing the Eight-Fold Teachings to categorize Shakyamuni's
teachings, T'ien T'ai grouped them into Five Periods based on the time in
which the Buddha expounded particular doctrines, which in turn were based on
the listeners' capacity, growth, and development. To compare and contrast the
Five Periods, he used the Three Analogies: 

1) the Three Illuminations, which show how various positions of the sun from
dawn to noon relate to Shakyamuni's teachings; 

2) the Parable (in the Lotus Sutra) of the rich man and his poor errant son,
who after many years away from home accidentally comes to his father's house
 but fails to recognize his father and his home; 

3) the Five Flavours: milk, cream, curdled milk, butter, and ghee, which
characterize the progression of Shakyamuni's teachings. 

I. In the first sutra he preached, the Flower Ornament (Kegon) Sutra,
Shakyamuni employs the Sudden method of teaching, since it reveals major
elements of truth suddenly" without prior groundwork for the listeners. The
Buddha can then gauge the audience's level of understanding. All people are
taught indiscriminately. 

This sutra represents dawn (First Illumination), when the sun's rays first
pierce the night, illuminating the highest regions of a mountain. As the
sun's first rays can only reach the mountaintop, the Kegon Sutra could only be
grasped by Bodhisattvas of the highest level, those "regally attired" who were
offered immediate entry to a form of Buddhahood. In the Parable from the Lotus
Sutra, the rich man (Shakyamuni), wanting to welcome his son (the people) into
his estate (enlightenment), sends one of his officials to do so. However, the
son, intimidated by such an opulent environment, declines this invitation. As
the first of the Five Flavours, the Sudden (Kegon) Teaching is likened to milk,
which in its raw state is a pure, nourishing substance containing all
essential ingredients for growth (protein, fat, carbohydrates, vitamins,
minerals, and water). While it is sometimes called the perfect food,
ironically, many cannot digest raw milk. 

II. After 21 days of preaching the Flower Ornament Sutra, Shakyamuni saw that
some could not grasp its truth. Travelling to "Deer Park", he preached the
Agama Sutras. During this 12 year period of preaching, known as the Period of
Deer Park Hinayana doctrine, including gradual, secret, and variable methods,
was taught. The Agamas contain such teachings as the Four Noble Truths and The
Twelve Links of Causation, which were aimed at those of the two vehicles
(learning and realization). 

In the Second Illumination, the sun's rays now reach down into the depths of
the valley. In the Parable from the Lotus Sutra, the rich man again tries to
invite his son into his estate by sending a humbly dressed worker as messenger,
rather than a court official. The second flavour of this teaching is cream,
which is more palatable and acceptable to a wide range of people than milk. Those of
Learning and Realization might attain a form of enlightenment through these
sutras, but since the teaching is Hinayana, they could only reach the level
of Arhat, gaining entry for themselves alone. 

III. In the 16 year Period of Expansion (Hoto), Hinayana, Shared, Distinct,
and Perfect doctrines were widely taught. Shakyamuni used gradual, secret, and
variable methods. Admonishing Hinayana practitioners for maintaining a
selfish practice, he emphasized a Mahayana concept of Ku to raise listeners'
awareness beyond the realm of Hinayana; this gave rise to many sects, such as
Hosso, Jodo, Zen, and Shingon. 

In the first part of the Third Illumination, the sun is now higher in the sky; its rays

have begun to illuminate the open fields, indicating an emergent proliferation of

Buddhist teachings. In the Parable from the Lotus Sutra, the father assigns the

son menial work to raise his awareness (of where and who he is) gradually. The

third flavour is likened to curdled milk: though nutritious, it is tart. 

IV. In the Period of Wisdom (prajna), which spanned 14 years, Shakyamuni
emphasized pure Mahayana teachings in expounding the six paramitas
(almsgiving, keeping the precepts, forbearance, assiduousness, meditation,
obtaining the wisdom). He preached shared, distinct, and perfect doctrines,
while using gradual, secret, and variable methods of conversion. 

In the second part of the third illumination, the sun's rays have spread more
widely over the fields but remain limited in scope. At this point in the
Parable from the Lotus Sutra, the father gradually increases the level of his
son's responsibilities to further his awareness. The fourth flavour is butter,
which is produced by mechanically transforming cream into a solid mass. Butter
 is a rich, flavourful, satisfying food. 

V. The fifth and final stage is the Lotus-Nirvana Period, during which the
Lotus Sutra was preached for 8 years and the Nirvana, for the day and night
before Shakyamuni's passing. Not communicating merely with those of the three
vehicles (Learning, Realization, and Bodhisattva), Shakyamuni expounded a
Perfect doctrine to open the door of enlightenment to all people, regardless
of their capacities. Similarly, in the Parable, the rich man finally opens his estate
completely to his son, who then enters without hesitation. The son realizes
that he is in a position to inherit and accept his father's domain. 

In this third part of the third Illumination, the sun is directly overhead
(at noon); its rays illuminate and embrace all comers of the mountain, valley,
and fields without discrimination. The fifth flavour is ghee, the richest of
all. Highly prized in India, ghee is a symbol of purity. To make it, one heats
butter slowly until all water content has evaporated (reduction), while milk
solids are mechanically removed. What remains is a deep amber coloured oil, termed
"clarified butter". This represents the clear, pure teaching of the Law. 

               
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The Lotus Sutra is the teaching that enables all to gain entry to the
condition of enlightenment, regardless of the listeners' respective capacities.
This great harvest" gathers all people in one great lesson. Pointing again to the
Lotus Sutra's Truth, the Nirvana Sutra acts as Shakyamuni's "net" to gather
the last of those who need to be directed to the highest teaching. 

Nichiren Daishonin considered T'ien T'ai's organization of sutras crucial, 

because it enables people to focus on what is profound in Buddhist doctrine 

and to avoid the error of embracing partial truths derived from lesser teachings.