This lecture is based on the Jain metaphysical text Pañcāstikāya–Saṅgraha, composed by Ācārya Śrīmad Bhagavad Kundakundācārya. The text is written in a highly condensed and philosophical style, where each verse carries deep ontological meaning. The intention of the text is not merely to classify reality but to provide clarity about existence so that right understanding may arise, which is essential for the path of liberation.
At the outset, the text makes it clear that reality is discussed in terms of padārtha, that is, that which truly exists and is knowable. In Jain philosophy, existence, knowability, and expressibility are inseparably connected. Whatever exists can be known, and whatever can be known can be named. Hence, ontology and epistemology are closely linked. Every padārtha is further analysed through the framework of substance (dravya), qualities (guṇa), and modes (paryāya), which together explain both stability and change in reality.
Jain metaphysics recognises six fundamental substances, known as ṣaḍdravyas—jīva, pudgala, dharma, adharma, ākāśa, and kāla. These substances are eternal, uncreated, and indestructible. Among them, five substances possess spatial extension and are therefore called astikāyas. These are jīva, pudgala, dharma, adharma, and ākāśa. Kāla, although real and essential for explaining change and sequence, does not possess spatial extension and hence is not classified as an astikāya.
The term astikāya itself conveys an important philosophical idea. Asti means that which exists, and kāya refers to that which has spatial extension through multiple space-points (pradeśas). Thus, an astikāya is not merely something that exists abstractly but something that exists with extension. This conception allows Jain philosophy to describe reality as structured and ordered rather than vague or indeterminate.
Each astikāya performs a distinct ontological function. Jīva is the conscious substance endowed with knowledge and perception and capable of bondage and liberation. Pudgala is material substance, characterised by form, taste, smell, and touch, and it constitutes the body and karmic matter. Dharma and adharma are not ethical concepts here; rather, they are the conditions that respectively enable motion and rest. Ākāśa provides space for all other substances to exist. None of these substances can replace or transform into another; each retains its own intrinsic nature.
Time (kāla) plays a special role in Jain ontology. It accounts for succession, change, and the distinction of past, present, and future. Although time is real and indispensable, it lacks spatial extension and therefore remains outside the category of astikāya. This distinction shows the precision with which Jain philosophy differentiates between existence and extension.
The text further explains the distinction between loka and aloka. Loka is the region where all five astikāyas coexist and interact. Beyond this lies aloka, which is infinite and immeasurable. Importantly, aloka is not emptiness or non-being. It is pure space—ākāśa alone—without the presence of jīva, pudgala, dharma, or adharma. In this way, Jain philosophy clearly rejects the idea of a cosmic void.
A central insight of Pañcāstikāya–Saṅgraha is the harmonious acceptance of permanence and change. Every substance remains permanent in its essential nature, while its modes continuously arise and perish. This doctrine avoids the extremes of absolute permanence and absolute momentariness. Substance persists, but expressions change. This balanced view is fundamental to Jain metaphysics.
Reality is also broadly classified into jīva and ajīva—the conscious and the non-conscious. Both are real, both undergo modification, and both are governed by the same ontological principles. The difference lies in consciousness, not in existence itself.
Underlying this entire framework is the Jain doctrine of anekāntavāda, the principle of non-absolutism. Reality is complex and multi-layered and cannot be grasped from a single standpoint. Different perspectives reveal different aspects of the same truth. Hence, permanence and change, unity and diversity, identity and difference are not contradictions but complementary insights.
Thus, Pañcāstikāya–Saṅgraha presents a vision of reality that is systematic, pluralistic, and deeply philosophical. It offers not only a map of existence but also a method of understanding reality without absolutism. This ontological clarity forms the intellectual foundation of the Jain path and supports the ethical and spiritual goal of liberation.
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