Buddhist philosophy

The foundational metaphysical framework of Buddhist philosophy is the Four Noble Truths, which diagnose suffering (dukkha) and prescribe the Noble Eightfold Path as its cure.¹ Central to this is the doctrine of anatta (non-self), which denies any permanent, unchanging essence in persons or phenomena, contrasting sharply with Hindu and Western notions of an eternal soul. The theory of dependent origination (pratītyasamutpāda) explains all phenomena as arising in dependence on causes and conditions, undermining any notion of independent existence. This leads to the concept of śūnyatā (emptiness), particularly emphasized in Mahayana philosophy, which asserts that all things are empty of intrinsic nature. These doctrines are not merely speculative but are intended to be realized through meditative insight, making Buddhist philosophy inherently practical.

Buddhist epistemology, especially as developed in the works of Dignāga and Dharmakīrti (6th–7th centuries CE), established a rigorous theory of knowledge based on two valid sources: perception (pratyakṣa) and inference (anumāna). These thinkers created a sophisticated system of Buddhist logic that influenced Indian and Tibetan scholasticism for centuries. They distinguished between ultimate truth (paramārtha-satya) and conventional truth (saṃvṛti-satya), a distinction that became crucial in Madhyamaka philosophy. The catuskoti (four-cornered negation) is a distinctive logical device used by Nāgārjuna to deconstruct metaphysical positions, challenging the law of excluded middle.² This logical rigor was applied to defend Buddhist doctrines against rival schools and to refine the path to liberation.

Buddhist ethics are grounded in the concept of karma and the intention (cetanā) behind actions, which determines their moral and soteriological consequences. The Five Precepts (abstaining from killing, stealing, sexual misconduct, lying, and intoxication) form the basic moral code for lay practitioners, while monastics follow more extensive Vinaya rules. The Bodhisattva ideal in Mahayana Buddhism expands ethical concern to all sentient beings, emphasizing compassion (karuṇā) and the vow to attain enlightenment for the benefit of others.³ Buddhist ethics are not deontological or consequentialist in the Western sense but are oriented toward the ultimate goal of liberation, with skillful means (upāya) allowing flexibility in practice. The Noble Eightfold Path integrates ethical conduct (sīla), mental discipline (samādhi), and wisdom (paññā) as interdependent dimensions of the path.

Beyond the well-known schools, Buddhist philosophy includes a rich tradition of Abhidharma analysis, which catalogues the constituents of reality into dharmas, influencing early psychological theory.⁴ The Yogācāra school introduced the concept of mind-only (vijñapti-mātratā), a form of idealism that parallels Western phenomenology. Buddhist philosophers also engaged in debates on the nature of time, universals, and the philosophy of language, as seen in the works of the 7th-century thinker Bhartṛhari (though he was a grammarian, his influence on Buddhist logic is notable). The Madhyamaka school's use of reductio arguments (prasaṅga) is a unique method that avoids asserting positive theses, a strategy that has fascinated modern philosophers like Jay Garfield.² Additionally, Buddhist philosophy has influenced contemporary Western philosophy, particularly in ethics (e.g., compassion-based ethics) and philosophy of mind (e.g., the concept of non-self in cognitive science).

Anatta

The doctrine of non-self, denying a permanent, unchanging self.

Śūnyatā

Emptiness; the absence of intrinsic existence in all phenomena.

Pratītyasamutpāda

Dependent origination; the principle that all things arise due to causes and conditions.

Catuskoti

A four-cornered logical scheme used to negate metaphysical positions.

Bodhisattva

One who seeks enlightenment for the benefit of all sentient beings.