The Four Noble Truths and the Nature of Dukkha

The Four Noble Truths (Pali: cattari ariyasaccani) form the doctrinal core of the Buddha's first sermon, the Dhammacakkappavattana Sutta, and are traditionally presented through the model of ancient Indian medical diagnosis: the identification of a disease, its cause, the prognosis that it can be cured, and the prescription of a treatment. The first truth, dukkha, is often translated as "suffering" but carries a broader semantic range covering unsatisfactoriness, stress, and the inherent unreliability of conditioned existence; the sutta enumerates birth, aging, illness, death, union with what is displeasing, separation from what is pleasing, not getting what one wants, and, in summary, the five aggregates (khandhas) of clinging as all constituting dukkha. Buddhist commentarial literature, notably the Visuddhimagga of Buddhaghosa (5th century CE), later systematized dukkha into three overlapping categories: dukkha-dukkha, the ordinary suffering of pain and hardship; viparinama-dukkha, the suffering inherent in the change and loss of pleasant states; and sankhara-dukkha, the subtler existential suffering built into the very structure of conditioned, compounded phenomena, even when no overt pain is present.