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Soul Science : Samayasāra by Jain Ācārya Kundakunda
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Udaya: Rise; Fruition of bonded Karma. Udaya of a specific bonded Karma means the Karma is mature to deliver its effect.
Upayoga: The defining characteristic of soul is known as Upayoga, and it is of two kinds: perception (Darśana) and knowledge (Iñāna).
Upādāna: Substantive cause.
Upādhyāya: In a group of Jain saints, a learned saint recognized by the Acārya by assigning the additional duites of teaching/studying is known as Upādhyāya.
Vedaniya Karma: Feeling producing Karma.
Vikalpa: Inclinataion towards any thought or thing; Contemplation; Exploration; Any mental activity; Feeling of attachment or aversion.
Vyavahāra Naya: Relative point of view.
Vyāpya-Vyāpaka Bhāva: According to the concept of Vyāpya-Vyāpaka Bhāva described by Acārya Amstacandra in the commentary of Gāthā 99, in an evolving entity and the evolved product there exists the same substance (Dravya). The Paryāya is called Vyāpya and its holder (Dravya) is called Vyāpaka.
Yoga: Physical, mental, and vocal activities; Vibrations of soul Pradeśa associated with physical, mental, and vocal activities; Plus.