Approximately 95% of the Thai citizenry are Theravada Buddhists. Thais themselves frequently call their religion Lankavamsa (Sinhalese lineage) Buddhism because Thailand originally received Buddhism from Sri Lanka during the Sukhothai period. Strictly speaking, Theravada refers only to the earliest forms of Buddhism practiced during the Ashokan and immediate port-Ashokan periods in South Asia. The early Dvaravati and pre-Dvaravati forms of Buddhism – those which existed up until the 10th or 11th century – are not the same as that which developed in Thai territories after the 13th century.
Since the Sukhothai period (13th to 15th centuries), Thailand has maintained an unbroken canonical tradition and ‘pure’ ordination lineage, the only country among the Theravadin countries to have done so. Ironically, when the ordination lineage in Sri Lanka broke down during the 18th century under Dutch persecution, it was Thailand that restored the Sangha (Buddhist brotherhood) there. To this day the major sect in Sri Lanka is called Siamopalivamsa (Siam-Upali lineage, Upali being the name of the Siamese monk who led the expedition to Ceylon), or simply Siam Nikaya (the Siamese sect).
Theravada school of Buddhism is an earlier and, according to its followers, less corrupted form of Buddhism than the Mahayana schools found in East Asia or in the Himalayan lands. The Theravada (literally, ‘teaching of the elders’) school is also called the ‘southern’ school since it took a southern route from India, its place of origin, through South-East Asia while the ‘northern‘ school proceeded into Nepal, Tibet, China, Korea, Mongolia, Vietnam and Japan. Because the Theravada school tried to preserve or limit the Buddhist doctrines to only those canons codified in the early Buddhist era, the Mahayana school gave Theravada Buddhism the name Hinayana, or the ‘lesser vehicle’. The Mahayana school was the ‘great vehicle’, because it built upon the earlier teachings, ‘expanding’ the doctrine in such a way as to respond more to the needs of lay people, or so it is claimed.
The Buddha taught his disciples :
When you see, just see.
When you hear, just hear.
When you smell, just smell.
When you touch, just touch.
When you know, just know.
By feeding monks, giving donations to temples and performing regular worship at the local ‘wat’ (temple) Thai people hope to improve their lot, acquiring enough merit to prevent or at least lessen the number of rebirths. The making of merit (‘tham bun’) is an important social and religious activity in Thailand. The concept of reincarnation is almost universally accepted in Thailand, even by non-Buddhists and the Buddhist theory of karma is well expressed in the Thai proverb ‘tham dii, dai dii : tham chua, dai chua’ (do good and receive good ; do evil and receive evil).
The Triratna, or Triple Gems, highly respected by Thai Buddhists, include the Buddha, the Dhamma (the teachings) and the Sangha (the Buddhist brotherhood). All are quite visible in Thailand. The Buddha, in his myriad and omnipresent sculptural forms, is found on a high shelf in the lowliest roadside restaurants as well as in the lounges of expensive Bangkok hotels.
The Dhamma is chanted morning and evening in every temple or ‘wat‘ and taught to every Thai citizen in primary school. The Sangha is seen everywhere in the presence of orange-robed monks, especially in the early morning hours when they perform their alms-rounds, in what has almost become a travel-guide cliché in motion.
Thai Buddhism has no particular ‘Sabbath’ or day of the week when Thais are supposed to make temple visits. Nor is there anything corresponding to a liturgy or mass over which a priest presides. Instead Thai Buddhists visit the ‘wat’ whenever they feel like it, most often on ‘wan phra’ (literally, ‘excellent days’), which occur with every full and new moon, ie every 15 days.
Socially, every Thai male is excepted to become a monk for a short period in his life, optimally between the time he finishes school and the time he starts a career or marries. Men or boys under 20 years of age may enter the Sangha as novices – this is not unusual since a family earns great merit when one if its sons ‘takes robe and bowl’. Traditionally, the length of time spent in the ‘wat’ is three months, during the Buddhist lent (phansa), which begins in July and coincides with the rainy season. However, nowadays men may spend as little as a week or 15 days to accrue merit as monks. There are about 32,000 monasteries in Thailand and 460,000 monks ; many of these monks are ordained for a lifetime. Of these a large percentage become scholars and teachers, while some specialise in healing and/or folk magic.
The Sangha is divided into two sects : the Mahanikai (Great Society) and the Thammayut (from the Pali dhammayutika or ‘dharma-adhering). The latter is a minority sect (the ratio being one Thammayut to 35 Mahanikai) begun by King Mongkut and patterned after an early Mon form of monastic discipline which he had practised as a monk (‘bhikkhu’). Members of both sects must adhere to 227 monastic vows or precepts as laid out in the Vinya Pitaka – Buddhist scriptures dealing with monastic discipline.
Overall discipline for Thammayut monks, however, is generally stricter. For example, they eat only once a day – before noon – and must eat only what is in their alms bowl, whereas Mahanikais eat twice before noon and may accept side dishes. Thammayut monks are expected to attain proficiency in meditation as well as Buddhist scholarship or scripture study ; the Manahanikai monks typically ‘specialise’ in one or the other. Other factors may supersede sectarian divisions when it comes to disciplinary disparities. Monks who live in the city, for example, usually emphasise study of the Buddhist scriptures while those living in the forest tend to emphasise meditation.