Within the Samkhya vision, the guṇas are understood as the fundamental qualities or modes that constitute Prakṛti, primordial nature or matter. They are not independent substances, but ever-present functional strands whose equilibrium defines the unmanifest state of Prakṛti. These three are sattva, associated with light, clarity, harmony, and knowledge; rajas, associated with activity, passion, and change; and tamas, associated with inertia, darkness, and ignorance. Every aspect of the manifest world is seen as a particular configuration of these three, always co-present in varying proportions. In this way, the guṇas provide a subtle grammar for understanding both the structure of the cosmos and the texture of experience.

When the original balance of the guṇas in unmanifest Prakṛti is disturbed, the process of manifestation and evolution begins. Through their interaction and shifting predominance, the various tattvas, or principles, emerge: from mahat (cosmic intelligence) and ahaṃkāra (ego-principle) to mind, senses, and the subtle and gross elements. The guṇas thus function as the dynamic principle by which the unmanifest becomes the manifest, giving rise to the entire phenomenal world. All change, movement, and differentiation in nature can be traced back to the ceaseless interplay of sattva, rajas, and tamas.

On the psychological plane, the guṇas account for mental states, character, and ethical disposition. A predominance of sattva is linked with clarity, virtue, and the capacity for knowledge; rajas with restlessness, striving, and attachment; and tamas with lethargy, confusion, and delusion. Experiences of pleasure, pain, and dullness are correlated respectively with sattva, rajas, and tamas, so that inner life itself is read as a shifting pattern of these qualities. Different temperaments and levels of consciousness are thus interpreted as different configurations of the same threefold matrix.

From the standpoint of spiritual liberation, the guṇas explain both bondage and release. Bondage arises because Puruṣa, pure consciousness, appears entangled in the ever-changing products of Prakṛti, all of which are woven from the guṇas. Through discriminative knowledge, Puruṣa is recognized as utterly distinct from Prakṛti and its modifications, including the guṇas. When this discernment becomes firm, the guṇas are said to cease their activity with respect to that Puruṣa, and the cycle of identification with pleasure, pain, and dullness falls away. In this state, Puruṣa abides in its own nature, while the play of the guṇas continues only for those still caught in their sway.