EIGHT JHĀNAS – In the Pāli canon the Buddha describes eight progressive states of absorption meditation or jhāna. Four are considered to be meditations of form (rūpa jhāna) and four are formless meditations (arūpa jhāna). The first four jhānas are said by the Buddha to be conducive to a pleasant abiding and freedom from suffering. The jhānas are states of meditation where the mind is free from the five hindrances — craving, aversion, sloth, agitation and doubt — and (from the second jhāna onwards) incapable of discursive thinking. The deeper jhānas can last for many hours. Jhāna empowers a meditator’s mind, making it able to penetrate into the deepest truths of existence.
There are four deeper states of meditative absorption called “the immaterial attainments.” Sometimes these are also referred to as the “formless” jhānas (arūpa jhānas) in distinction from the first four jhānas (rūpa jhānas). In the Buddhist canonical texts, the word “jhāna” is never explicitly used to denote them, but they are always mentioned in sequence after the first four jhānas. The enlightenment of complete dwelling in emptiness is reached when the eighth jhāna is transcended.