A meditation experience where you see mental and physical phenomena arising and dissolving moment by moment.
Knowledge of Arising and Passing Away (Udayabbayañāṇa in Pali) is a specific type of insight knowledge that occurs during vipassanā (insight meditation). It is the direct perception of anicca—impermanence—as phenomena continuously emerge and disappear at the level of ultimate reality. This knowledge represents a distinct stage in the traditional progression of insight knowledges outlined in the Theravāda Buddhist framework, specifically in texts like the Visuddhimagga (Path of Purification).
This experience is not merely intellectual understanding that things change. Rather, it is direct, unmediated observation of the actual arising and passing away of mental and physical phenomena—sensations, thoughts, emotions, perceptions—as they occur moment by moment. The meditator observes the rapid flux of experience with clarity and precision.
The Knowledge of Arising and Passing Away typically develops after establishing stable concentration (samādhi) and initial clear seeing of the three characteristics of existence: impermanence, unsatisfactoriness, and non-self. The meditator begins by observing phenomena in their body and mind—physical sensations, breath, thoughts—and gradually perceives their transient nature more vividly.
As practice deepens, the mind's natural processing speed increases, allowing perception of finer and finer moments of experience. Where the meditator initially observed sensations lasting seconds, they now perceive them fragmenting into rapid pulses of arising and ceasing. This is sometimes described as seeing 'the grain' of reality—the fundamental flickering quality of all conditioned phenomena. The experience typically feels vivid and compelling, often accompanied by a sense of clarity and illumination.
The Knowledge of Arising and Passing Away has several recognizable qualities. First, there is sustained attention to the momentary appearance and disappearance of phenomena. The meditator witnesses countless events arising and passing within a single second of clock time. Second, there is emotional tone: practitioners often describe excitement, fascination, or even fear, as the stability of apparent reality reveals itself to be illusory.
Third, there is a particular quality of clarity—often described as 'bright' or 'shining'—in which the arising and passing of phenomena becomes self-evident. Fourth, the meditator typically notices that the knowing mind itself also arises and passes away in synchronization with the observed phenomena. This reciprocal relationship between observer and observed begins to blur. Fifth, there is usually a noticeable shift in how stable or solid any experience seems; the sense of 'thingness' drops away.
In the classical scheme presented in the Visuddhimagga and commentarial texts, the Knowledge of Arising and Passing Away follows the Knowledge of Comprehension, where the meditator first systematically understands phenomena as impermanent, unsatisfactory, and non-self. It is followed by the Knowledge of Dissolution, where attention narrows to the passing away of phenomena until the arising aspect becomes imperceptible.
This progression continues through subsequent knowledges including Fear, Misery, Disgust, Desire for Deliverance, Re-observation, Equanimity toward Formations, and eventually the Supramundane Knowledge that achieves Stream-entry or higher attainment. The Knowledge of Arising and Passing Away is therefore positioned as a significant milestone but not the final goal—it represents deepening penetration of impermanence but still occurs within the realm of mundane (worldly) consciousness.
Practitioners report varied subjective experiences during this knowledge. Some describe seeing phenomena as rapidly flashing like a film reel or a strobe light. Others perceive a grain-like or pointillist quality, with countless discrete moments of experience. Some focus on gross sensations; others on subtler mental events. The pace varies—some meditators perceive dozens of events per second; others experience the arising and passing more slowly.
Variation also occurs based on body location. A meditator might perceive rapid arising and passing in sensations across the whole body, or concentrate on particular regions. Emotional responses range from rapture and joy to anxiety or restlessness. Some experience a sense of the body as a collection of energy flows rather than solid matter. These variations are considered normal; the essential characteristic is the clear perception of momentary flux, regardless of sensory modality or emotional coloration.
The Knowledge of Arising and Passing Away serves several important functions in Buddhist practice. It provides compelling, non-conceptual evidence of impermanence that can dissolve intellectual doubt and strengthen commitment to practice. It shifts the meditator's relationship to experience from passive identification to active observation. It weakens attachment by demonstrating the futility of clinging to what cannot be retained. It also generates momentum toward deeper insight, as the mind naturally continues investigating this extraordinary discovery.
However, this knowledge has important limitations. Despite its apparent profundity and the excitement it often generates, it is still a mundane knowledge—it has not yet stepped beyond conventional reality into the supramundane. It can become a source of subtle attachment if the meditator clings to the experience as 'special' or pursues the pleasant emotional states that often accompany it. Traditional teachings warn against becoming fascinated by these intermediate experiences (called 'pit-falls' or 'upakkilesa'), as this can divert attention from the ultimate goal of cessation and liberation.
The Knowledge of Arising and Passing Away is the experiential verification of core Buddhist teaching. The Buddha taught in the Anattalakkhaṇa Sutta (SN 22.59) that all phenomena are impermanent, unsatisfactory, and without self. The Knowledge of Arising and Passing Away is direct seeing of this doctrine as living truth rather than abstract principle.
This knowledge also relates directly to the doctrine of dependent origination (pratītyasamutpāda). By perceiving the moment-to-moment arising and ceasing of conditions, the meditator implicitly observes how phenomena arise in dependence on causes and cease when conditions are absent. The entire edifice of dependent origination becomes transparent at the level of direct experience. This is why classical texts consider this knowledge crucial for dissolving the fundamental delusion of permanence and selfhood that underlies suffering.