Sattva

The three gunas are, in the Samkhya philosophy of India and in the Bhagavad Gita, the three fundamental qualities or strands of which prakriti, primordial material nature, is woven; everything manifest is a mixture of the three in shifting proportion. Sattva is the guna of purity, harmony, clarity and balance, the quality of light, intelligence, calm and goodness, the strand that reveals and illuminates.

In the Samkhya scheme the three gunas are not moral categories imposed from outside but the actual constituents of nature, and sattva is the finest and most transparent of them, associated with knowledge, serenity and the upward pull toward the spiritual. The Bhagavad Gita, especially in its fourteenth, seventeenth and eighteenth chapters, classifies food, action, knowledge, worship and temperament by their predominant guna, and the cultivation of sattva over the restless rajas and the dull tamas is presented as a stage on the path, though the ultimate aim is to pass beyond all three. The doctrine is ancient and central to Hindu thought.

Sources Classical Samkhya: An Interpretation of Its History and MeaningGerald James Larson with Srimad-Bhagavad-Gita, English translation and commentarySwami Swarupananda

The three gunas are applied in Indian thought well beyond metaphysics, most concretely in diet: the Bhagavad Gita's seventeenth chapter classifies food itself as sattvic, rajasic or tamasic, with sattvic food described as wholesome, mild and life giving, favoured by those seeking clarity and calm. The same threefold grid extends to speech, giving, austerity and action, so that a gift given without expectation of return is called sattvic while one given reluctantly or for show is not, making the gunas a working ethical vocabulary and not only a cosmological one.

No person or substance is held to embody a single guna purely; all three are always present together in shifting proportion, and spiritual practice across several Indian schools aims to increase sattva relative to the other two as a stage on the way, since even sattva, being a quality of manifest nature, is ultimately something to be transcended rather than the final goal. That transcendence is called gunatita, being beyond the gunas altogether, a state the Gita associates with liberation itself.

Modern popular writing sometimes reduces the gunas to a simple mood chart or personality quiz, a simplification that drops both the doctrine of constant mixture and the aim of transcending sattva along with the other two, rather than resting in it as a final state.