What is Buddhism?

"'Dukkha should be known. The cause by which dukkha comes into play should be known. The diversity in dukkha should be known. The result of dukkha should be known. The cessation of dukkha should be known. The path of practice for the cessation of dukkha should be known.' Thus it has been said. In reference to what was it said?

"Birth is dukkha, aging is dukkha, death is dukkha; sorrow, lamentation, pain, distress, & despair are dukkha; association with what is not loved is dukkha, separation from what is loved is dukkha, not getting what is wanted is dukkha. In short, the five clinging-aggregates are dukkha.

(Definitions of sorrow, lamentation, pain, distress, despair, association with the ubeloved, separation from the loved, not getting what is wanted)

"And what is the cause by which dukkha comes into play? Craving is the cause by which dukkha comes into play.

"And what is the diversity in dukkha? There is major dukkha & minor, slowly fading & quickly fading. This is called the diversity in dukkha.

"And what is the result of dukkha? There are some cases in which a person overcome with pain, his mind exhausted, grieves, mourns, laments, beats his breast, & becomes bewildered. Or one overcome with pain, his mind exhausted, comes to search outside, 'Who knows a way or two to stop this pain?' I tell you, monks, that dukkha results either in bewilderment or in search. This is called the result of dukkha.

"And what is the cessation of dukkha? From the cessation of craving is the cessation of dukkha; and just this noble eightfold path — right view, right resolve, right speech, right action, right livelihood, right effort, right mindfulness, right concentration — is the path of practice leading to the cessation of dukkha.

"Now when a disciple of the noble ones discerns dukkha in this way, the cause by which dukkha comes into play in this way, the diversity of dukkha in this way, the result of dukkha in this way, the cessation of dukkha in this way, & the path of practice leading to the cessation of dukkha in this way, then he discerns this penetrative holy life as the cessation of dukkha."

— AN 6.63

"The First Noble Truth: The Noble Truth of dukkha", edited by John T. Bullitt. Access to Insight, May 26, 2010, http://www.accesstoinsight.org/ptf/dhamma/sacca/sacca1/index.html