Within the Jain spiritual vision, fasting (upavāsa) is not merely a physical discipline but a carefully structured means of inner purification and progress toward liberation. It is grounded in the core ideals of non‑violence (ahimsa) and non‑attachment (aparigraha), and is understood as a way to diminish the influx of new karma while shedding karmic matter already bound to the soul (nirjarā). By voluntarily accepting limits on bodily comfort, the practitioner seeks to weaken passions such as greed, pride, and attachment, thereby creating the conditions for greater clarity, humility, and equanimity. In this sense, fasting is valued not as an act of self‑denial for its own sake, but as a deliberate turning of attention from the body toward the deeper reality of the soul.

Jain teachings describe a wide range of fasting practices, from complete abstinence from food, sometimes with only water allowed, to more moderate forms such as eating once a day, restricting certain foods, or adopting very simple, unspiced meals. These external austerities (tapas) are considered truly fruitful only when joined with internal disciplines such as repentance, scriptural study, meditation, and the cultivation of forgiveness and calm. The emphasis consistently falls on the inner disposition: the same outward fast can either strengthen spiritual growth or inflate ego, depending on whether it is undertaken with sincerity, humility, and right understanding, or for display and social praise. Thus, the measure of a fast is not its severity, but the quality of awareness and intention that accompanies it.

As a tool for spiritual growth, fasting serves several intertwined purposes. It trains the practitioner in control of the senses, teaching how to endure hunger and desire without agitation, and thereby loosening the hold of bodily cravings. It supports non‑violence by reducing the consumption that inevitably involves harm to living beings, and it fosters compassion and contentment by revealing how little is actually needed to sustain life. When undertaken with right faith, right knowledge, and right conduct, fasting becomes a means of deepening meditation, refining moral virtues, and preparing the soul for higher states of detachment. For householders, this usually takes the form of periodic and moderate fasts suited to worldly responsibilities, while monastics may engage in more rigorous austerities, always within the bounds of health, capacity, and the principle of non‑violence toward oneself.