How a 7th-century Buddhist logician built a system to defend reality through causal power
In short: Dharmakirti, an influential Indian philosopher at Nalanda, revolutionized Buddhist epistemology by grounding truth in causal efficacy. He argued that only momentary particulars are truly real, while our conceptual world is a linguistic construct. His rigorous logic became the bedrock of Tibetan monastic education and a powerful tool for intellectual defense.
Active in the 7th century, likely between 600 and 660 CE, Dharmakirti emerged during the decline of the Gupta Empire. As Buddhist institutions faced increasing pressure from sophisticated Hindu schools like the Nyaya, Dharmakirti refined the work of his predecessor, Dignaga. He transformed Buddhist logic from a tool for simple debate into a systematic, full-fledged epistemology designed to defend Buddhist doctrines against non-Buddhist traditions.
At the heart of his philosophy lies a strict nominalism. Dharmakirti posited that the only truly real things are momentary, part-less particulars (svalakṣaṇa). These particulars possess causal power (arthakriyā), which is the ultimate test of reality. Anything that lacks this efficacy—such as universals or linguistic categories—is merely a conventional fiction. We navigate the world by superimposing these constructs onto the flow of reality, a process often distorted by latent mental tendencies.
Dharmakirti’s system relies on two valid instruments of knowledge: perception and inference. Perception provides direct, non-conceptual access to particulars, while inference allows us to navigate the world through conceptual schemas. He famously argued that consciousness is self-reflexive, illuminating itself like a lamp. While he defended the Buddha’s authority, he maintained a nuanced view of scripture, arguing it should not override rational inquiry on matters accessible to logic, though it remains useful for understanding inaccessible topics like karma.
His legacy remains deeply contested. Tibetan scholars have debated for centuries whether he was a proponent of the Yogacara or Sautrantika schools, with some even interpreting him through a Madhyamaka lens. Today, his works, particularly the Pramāṇavārttika, continue to serve as the foundation for rigorous debate in Tibetan monasteries, proving that his intellectual defense of Buddhism remains as vital as it was in the halls of Nalanda.
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Sources
- Summary by Intellect · source: Dharmakirti
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