As Buddhist externalists, both Saṅghabhadra and Śubhagupta claim the existence of an external object on the basis of atomism. In this paper, I will show the interrelationship between Saṅghabhadra’s and Śubhagupta’s atomic theories. Regarding the ontological status of the aggregation of atoms, both of them agree on a Vaibhāṣika principle that the aggregation of atoms, as a real substance, can serve as an object-support of cognition. Based on this principle, their similarities can be further explicated from three aspects. Regarding epistemology, (...) Śubhagupta differs from Saṅghabhadra on the cognitive process of the awareness of something blue. For Saṅghabhadra, a gross object is grasped by non-conceptual sensory consciousness because it is a real entity aggregated by atoms. Through the function of vitarka of sensory consciousness, an object with its essential nature, i.e., the colour blue, is distinguished from other entities. Then, it is known as the notion ‘blue’, which is a mere provisional existence, through the conceptual thought of mental consciousness. However, for Śubhagupta, a coarse object such as something blue is only a mental error of conceptual construction. (shrink)

Vasubandhu’s arguments against atomism in Viṃśikā stanzas 12–13 are not strong enough to disprove that atoms are simple partless substances. However, if we take the special composition question into consideration, Viṃśikā stanza 13ab can be regarded as an objection to so-called series-style answers, which results in an undesirable conclusion for the opponents, i.e. the Vaibhāṣikas. A step back to a simple bonding answer is not a good choice for the Vaibhāṣikas in responding to this objection because the simple bonding answer (...) leads to other difficulties and because some notions in Vaibhāṣika atomic theory entail multigrade relations in the material aggregates of atoms. Hence, the objection to series-style answers still makes sense in the refutation of Buddhist atomism through the claim that atoms are not proper parts of a material aggregate. (shrink)

To answer the question about an internal object serving as a cause of cognition, in his Ālambanaparīkṣāvṛtti, Dignāga elaborates two types of causality in the significance of object-support : simultaneous causality and successive causality. Simultaneous causality is characterized as invariably concomitant, which refers to the inevitable co-existence of an object and its cognition. Successive causality is characterized as resemblance, which refers to a definite causal relationship between the immediate previous consciousness and its subsequent consciousness. That is, the preceding consciousness remains (...) a potential power that transmits gradually to the subsequent consciousness. The potential power is carried with an object appearance in the stream of consciousness and becomes an actual internal object similar to the previous object in the subsequent consciousness. There are two alternatives of Dignāga’s ambiguous interpretation: either the internal object of the previous consciousness or the potential power can be regarded as an object-support for the subsequent consciousness. However, in his Bāhyārthasiddhikārikā, Śubhagupta criticizes both alternatives, writing that neither of these two serves as an object-support because neither appears in the subsequent consciousness. Therefore, they fail to fulfil the first requirement of an object-support even though they could fulfil the second requirement of an object-support. In addition, Śubhagupta argues that the causal relationship between the preceding consciousness and its subsequent consciousness is not necessary. (shrink)