Within nontheist Buddhist practice, anatta, or non-self, points to the absence of any permanent, unchanging, independent soul or essence behind experience. What is ordinarily called “self” is understood as a convenient designation for a dynamic stream of physical and mental events, rather than a solid entity that endures unchanged over time. This stream is described in terms of the five aggregates: form (the body or material aspect), feeling tones, perception, mental formations such as thoughts and emotions, and consciousness or awareness. Each of these aggregates is impermanent and conditioned, arising and passing away in dependence on countless causes and conditions. Because they are dependently arisen and constantly shifting, they cannot serve as a stable foundation for a fixed identity.

From this perspective, the sense of “I” functions as a practical convention in communication and ethical life, but it does not point to an independent metaphysical core. Nontheist practice treats the self as a useful label for an ongoing process, not as the name of an inner substance that stands apart from the flow of conditions. This insight is not meant as an abstract metaphysical claim alone, but as something to be examined directly through meditation and mindful observation. By carefully attending to sensations, thoughts, and emotions as they arise and pass, practitioners fail to find an owner or controller separate from these processes, and the apparent solidity of the self begins to loosen.

The purpose of realizing non-self is deeply practical: clinging to a solid, separate self is seen as a root of fear, craving, pride, and defensiveness, which together generate suffering. As the illusion of a permanent self is gradually seen through, attachment to status, possessions, and even to life and death themselves can soften. This softening opens space for greater equanimity and compassion, since experience is no longer organized so rigidly around protecting and enhancing a fixed “me.” In this way, insight into anatta works hand in hand with the recognition of impermanence and unsatisfactoriness, serving as a central contemplative tool for transforming how life is understood and lived, without appeal to any deity or supreme being.