Definition
Satya is truth in its deepest sense — not merely factual accuracy but ontological reality. It is derived from sat (सत्), meaning "being, existence, the real." Satya is that which IS, as opposed to asat (non-being, illusion). In the Upanishads, satya is identified with Brahman — the ultimate reality. The Mundaka Upanishad declares "Satyameva jayate" — "Truth alone triumphs." Satya also has an ethical dimension: it means truthfulness in thought, speech, and action — the alignment (ṛta) of word with fact and of deed with word. Gandhi's concept of satyagraha ("truth-force" or "soul-force") draws on this tradition. In the yoga tradition, satya is one of the five yamas (ethical restraints) — the practice of speaking and living truthfully.
Etymology
From sat (सत्), the present participle of the root as (अस्), "to be." Satya means "that which is truly real" — the existent, the true, the real as opposed to the illusory.
Key Texts
Related Verses
सत्यमेव जयते नानृतम्
satyameva jayate nānṛtam
Truth alone triumphs, not falsehood. Truth is the path of the divine.
Mundaka Upanishad 3.1.6सत्यं शिवं सुन्दरम्
satyaṃ śivaṃ sundaram
Truth, auspiciousness, beauty — the three attributes of the Real.
Traditional invocationसत्यं वद
satyaṃ vada
Speak the truth. (Satyam vada, dharmam cara — "Speak truth, practice dharma.")
Taittiriya Upanishad 1.11.1Interpretations Across Traditions
Advaita Vedanta
Satya is Brahman alone — the only truly real (sat). The world is "neither real nor unreal" — empirically real but ultimately sublated. "Truth" means recognizing this.
Gandhian philosophy
Satya is the supreme principle — God is Truth, and Truth is God. Satyagraha is the method of resisting injustice through truth-force rather than violence.
Yoga tradition
Satya is the second of the five yamas (ethical restraints). It means truthfulness in thought, word, and deed — speaking only what is true and beneficial.