In the Jain Metaphysics, the term loka is used to denote the universe. The etymological meaning of the term loka is ‘that which is seen or observed’. [1] This is a general expression of universe. The descriptive definition is ‘The loka is that which is composed of six real entities’ [12], viz.,
1. | Dharmāstikāya | : | Medium of Motion |
2. | Adharmāstikāya | : | Medium of Rest |
3. | Ākāśāstikāya | : | Space |
4. | Kāla | : | Time |
5. | Pudgalāstikāya | : | Physical order of existence (matter and energy) |
6. | Jīvāstikāya | : | Psychical order of existence.’ |
Thus, the universe is nothing but the totality of six substances.
At some places, however, it is said to be composed of five astikāyas. Lord Mahāvīra, when asked by his disciple Gautama ‘What is loka?’ the Lord replied, ‘Gautama! the loka is composed of five astikāyas, i.e., extended substances, viz., the medium of motion, medium of rest, space, physical order of existence and psychical order of existence. [3] Here, kāla (time) is not included, because it is not an extended substance. The concept of astikāya, i.e., extended substance is a peculiar concept of Jainism. It means conglomeration or aggregate of pradeśas.[4] Pradeśa is defined as that part of a substance, which itself has no part and which is not detached from the substance. [5] But kāla[6] has no such units, so it can not be considered as an extended substance.
Now, let us first understand the term substance as described by Jain philosophy. First of all, it should be made clear that in the Jain philosophy, the terms reality (sat) and substance (dravya) are used more or less in the same sense. [7] In the Jain philosophy, the reality is defined as ‘possessor of an infinite number of attributes.’ [8] It is also defined as ‘that which is capable of continuous existence undergoing various changes of origination (utpāda) and cessation (vyaya).’ [9] The former is a constitutional definition whereas the latter is a functional one. Combining these definitions we come to a broader definition of the term substance, ‘that which is the substratum of attributes and modes is substance.’ [10] In other words, a substance or a reality is possessed of two properties-quality, which is a persisting possession, and mode, which is transitory and flowing.
Guṇa-paryāyavat dravyam. - Tattvārtha Sūtra, 5.38.
Also, Cf. J. S. Zaveri, op.cit., p.123.