Satya

“When the practitioner is firmly established in the practice of the truth, his words become so potent that whatever he says comes to realization.” — yoga sutras

“The first yama, ahimsa, concerns love, and the second, satya, concerns truth. Satya gives us our first experience of a paradox in yoga. We begin the practice of satya with considerable will and attention as we work hard to speak the truth and live the truth. Every conversation, every mundane activity invites our scrutiny: are we being truthful in thought, word and deed? Over time, though, the successful application of will and attention actually strips us of our need for both. Initially, we experience satya as having to do with concrete events and words. Either we kept a commitment, or we did not. Little by little we notice, and then drop, our old habits of embellishment, obfuscation, minimization, self-aggrandizement,omission, rationalization, and exaggeration. ”

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“At first, then, satya is practiced from the outside in. Eventually, however, we become fully established in the practice of truth — so much so that we begin to live satya from the inside out. As the layers of falsehood fall away, an intimacy develops with our own truth. Ultimately, our truth becomes all there is. Truth becomes our essence and reality, our deepest desire, and the air that we breathe.” — Rolf Gates, Mediations from the Mat

The philosophical meaning of the word ‘Satya’ is “unchangeable”, “that which has no distortion”, “that which is beyond distinctions of time, space, and person”, “that which pervades the universe in all its constancy”. — Wikipedia

This sounds very much like Tao to me.