Various Buddhist philosophical schools developed within Buddhism, giving various interpretations regarding more refined points of karma. A major problem is the relation between the doctrine of no-self, and the "storage" of the traces of one's deeds, for which various solutions have been offered.
Early Indian Buddhism Origins The concept of
karma originated in the
Vedic religion, where it was related to the performance of rituals or the investment in good deeds to ensure the entrance to heaven after death, while other persons go to the underworld.
Pre-sectarian Buddhism The concept of karma may have been of minor importance in early Buddhism. Schmithausen has questioned whether karma already played a role in the theory of rebirth of earliest Buddhism, noting that "the karma doctrine may have been incidental to early Buddhist soteriology." Langer notes that originally karma may have been only one of several concepts connected with rebirth. Tillman Vetter notes that in early Buddhism rebirth is ascribed to craving or ignorance. Buswell too notes that "Early Buddhism does not identify bodily and mental motion, but desire (or thirst,
trsna), as the cause of karmic consequences." Matthews notes that "there is no single major systematic exposition" on the subject of karma and "an account has to be put together from the dozens of places where karma is mentioned in the texts," which may mean that the doctrine was incidental to the main perspective of early Buddhist soteriology. According to Vetter, "the Buddha at first sought, and realized,
"the deathless" (
amata/amrta), which is concerned with the here and now. Only after this realization did he become acquainted with the doctrine of rebirth." Bronkhorst disagrees, and concludes that the Buddha "introduced a concept of karma that differed considerably from the commonly held views of his time." According to Bronkhorst, not physical and mental activities as such were seen as responsible for rebirth, but intentions and desire. The doctrine of karma may have been especially important for common people, for whom it was more important to cope with life's immediate demands, such as the problems of pain, injustice, and death. The doctrine of karma met these exigencies, and in time it became an important soteriological aim in its own right.
Vaibhāṣika-Sarvāstivādin tradition The Vaibhāśika-Sarvāstivāda was widely influential in India and beyond. Their understanding of karma in the Sarvāstivāda became normative for Buddhism in India and other countries. According to Dennis Hirota, The
Abhidharmahṛdaya by Dharmaśrī was the first systematic exposition of Vaibhāśika-Sarvāstivāda doctrine, and the third chapter, the
Karma-varga, deals with the concept of karma systematically. Another important exposition, the
Mahāvibhāṣa, gives three definitions of karma: • action; karma is here supplanted in the text by the synonyms
kriya or
karitra, both of which mean "activity"; • formal vinaya conduct; • human action as the agent of various effects; karma as that which links certain actions with certain effects, is the primary concern of the exposition. The 4th century philosopher
Vasubandhu compiled the
Abhidharma-kośa, an extensive compendium which elaborated the positions of the
Vaibhāṣika-
Sarvāstivādin school on a wide range of issues raised by the early sutras. Chapter four of the Kośa is devoted to a study of karma, and chapters two and five contain formulations as to the mechanism of fruition and retribution. This became the main source of understanding of the perspective of early Buddhism for later
Mahāyāna philosophers.
Dārṣṭāntika-Sautrāntika The Dārṣṭāntika-
Sautrāntika school pioneered the idea of karmic seeds (S.
Bīja) and "the special modification of the psycho-physical series" (S.
saṃtatipaṇāmaviśeṣa) to explain the workings of karma. According to Dennis Hirota,
Theravādin tradition Canonical texts In the
Theravāda Abhidhamma and commentarial traditions, karma is taken up at length. The
Abhidhamma Sangaha of Anuruddhācariya offers a treatment of the topic, with an exhaustive treatment in book five (5.3.7). The
Kathāvatthu, which discusses a number of controverted points related either directly or indirectly to the notion of kamma." This involved debate with the
Pudgalavādin school, which postulated the provisional existence of the person (S.
pudgala, P.
puggala) to account for the ripening of karmic effects over time. The Kathāvatthu also records debate by the Theravādins with the Andhakas (who may have been
Mahāsāṃghikas) regarding whether or not old age and death are the result (
vipāka) of karma. The Theravāda maintained that they are not—not, apparently because there is no causal relation between the two, but because they wished to reserve the term
vipāka strictly for mental results--"subjective phenomena arising through the effects of kamma." In the canonical Theravāda view of kamma, "the belief that deeds done or ideas seized at the moment of death are particularly significant."
Transfer of merit The
Milindapañha, a
paracanonical Theravāda text, offers some interpretations of karma theory at variance with the orthodox position. In particular,
Nāgasena allows for the possibility of the transfer of merit to humans and one of the four classes of
petas, perhaps in deference to folk belief. Nāgasena makes it clear that demerit cannot be transferred. One scholar asserts that the sharing of merit "can be linked to the Vedic
śrāddha, for it was Buddhist practice not to upset existing traditions when well-established custom was not antithetic to Buddhist teaching." The
Petavatthu, which is fully canonical, endorses the transfer of merit even more widely, including the possibility of sharing merit with all petas.
Mahayana tradition Indian Yogācāra tradition In the
Yogācāra philosophical tradition, one of the two principal Mahāyāna schools, the principle of karma was extended considerably. In the Yogācāra formulation, all experience without exception is said to result from the ripening of karma. Karmic seeds (S.
bija) are said to be stored in the "storehouse consciousness" (S.
ālayavijñāna) until such time as they ripen into experience. The term
vāsāna ("perfuming") is also used, and Yogācārins debated whether vāsāna and bija were essentially the same, the seeds were the effect of the perfuming, or whether the perfuming simply affected the seeds. The seemingly external world is merely a "by-product" (
adhipati-phala) of karma. The conditioning of the mind resulting from karma is called
saṃskāra. The
Treatise on Action (
Karmasiddhiprakaraṇa), also by Vasubandhu, treats the subject of karma in detail from the Yogācāra perspective. According to scholar Dan Lusthaus, According to Bronkhorst, whereas in earlier systems it "was not clear how a series of completely mental events (the deed and its traces) could give rise to non-mental, material effects," with the (purported) idealism of the Yogācāra system this is not an issue. In Mahāyāna traditions, karma is not the sole basis of rebirth. The
rebirths of
bodhisattvas after the seventh stage (S.
bhūmi) are said to be consciously directed for the benefit of others still trapped in . Thus, theirs are not uncontrolled rebirths.
Mādhyamaka philosophy Nāgārjuna articulated the difficulty in forming a karma theory in his most prominent work, the
Mūlamadhyamakakārikā (Fundamental Verses on the Middle Way): The
Mūlamadhyamakavṛtty-Akutobhayā, also generally attributed to Nāgārjuna, concludes that it is impossible both for the act to persist somehow and also for it to perish immediately and still have efficacy at a later time.
Tibetan Buddhism In Tibetan Buddhism, the teachings on karma belong to the preliminary teachings, that turn the mind towards the Buddhist dharma. In the Vajrayana tradition, negative past karma may be "purified" through such practices as meditation on
Vajrasattva because they both are the mind's psychological phenomenon. The performer of the action, after having purified the karma, does not experience the negative results he or she otherwise would have. Engaging in the ten negative actions out of selfishness and delusions hurts all involved. Otherwise, loving others, receives love; whereas; people with closed hearts may be prevented from happiness. One good thing about karma is that it can be purified through confession, if the thoughts become positive. Within Guru Yoga seven branch offerings practice, confession is the antidote to aversion.
East Asian traditions Zen Dōgen Kigen argued in his
Shobogenzo that karmic latencies are emphatically not empty, going so far as to claim that belief in the emptiness of karma should be characterized as "non-Buddhist," although he also states that the "law of karman has no concrete existence." Zen's most famous
koan about karma is called
''Baizhang's Wild Fox'' (百丈野狐). The story of the koan is about an ancient Zen teacher whose answer to a question presents a wrong view about karma by saying that the person who has a foundation in cultivating the great practice "does not fall into cause and effect." Because of his unskillful answer the teacher reaps the result of living 500 lives as a wild fox. He is then able to appear as a human and ask the same question to Zen teacher Baizhang, who answers, "He is not in the dark about cause and effect." Hearing this answer the old teacher is freed from the life of a wild fox. The Zen perspective avoids the duality of asserting that an enlightened person is either subject to or free from the law of karma and that the key is not being ignorant about karma.
Tendai The Japanese
Tendai/
Pure Land teacher
Genshin taught a series of ten reflections for a dying person that emphasized reflecting on the
Amida Buddha as a means to purify vast amounts of karma.
Nichiren Buddhism Nichiren Buddhism teaches that transformation and change through faith and practice changes adverse karma—negative causes made in the past that result in negative results in the present and future—to positive causes for benefits in the future. ==Modern interpretations and controversies==