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Kevalajauna is perfect knowledge of all substance and their modifications. It is generated after complete destruction of the veil of the Mohaniya karma ( delusing) which is the most powerful in the Karmic matter. Hence the soul comes to perceive all things past, present and future. When a person achieves perfect knowledge, he is called Omniscient.
According to Jainism, no one can be a teacher (Tirthankara) without being omniscient. This perfect knowledge can be obtained by the purified soul which has consiousness cetana or upayoga) as its sole characteristic.119 The term Upayoga is used to denote the darśana and jñana which are the main features of the soul. Darsana is perception and jñāna is knowledge.120 Soul, its knowledge, and its intution all these are identical and hence each can reveal the self as well as nonself.121 Akalanka is of the view that when the soul cognises the object, it is called Jñana; and when the soul perceives itself, it is called Darsana,122
It is apparent now that at the destruction of Jaunavaraṇa, Darsanavarana; Mohaniya, and Antaraya, the soul obtains inner illumination and becomes omniscient.
According to Jaina philosophy, each and every entity is somehow related to all other entities in the universe. Such relations are called modes or paryayas of the entity. If one knows an entity completely, these modes will also be known completely. That is why it is said that one who knows one, knows all, and one who knows all, knows one. In the Pravacanasara, Kunda-Kunda says: One who does not know simultaneously the realities of past, present and future, and the three worlds, cannot know even a single object with its infinite modifications, if one does not know all objects, how will he be able to know one? For instance, if one is inclined to have a knowledge of ghata, he should have knowledge of its intrinsic nature as well as ghata itself, since knowledge reveals all the objects. As the soul has infinite capacity to know all the objects, when one attains such power, he has to know all the ob. jects.124 severe penance with Right vision, Right knowledge,
