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Why did the Vedas link truth, right conduct, and the nature of the universe?

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Marble bust of Pythagoras, the ancient Greek mathematician and philosopher, showing a bearded man with a head covering and calm expression. — History of ethics Greek philosopher and mathematician Pythagoras, portrait bust.

In the Vedic tradition, the link between truth, right conduct, and the nature of the universe is encapsulated in the concept of rita. Rita is understood as the fundamental cosmic-moral principle of order that governs both the physical universe and the moral behavior of individuals.123

The Vedas posit that the same law that ensures the regularity of natural phenomena—such as the sun and moon following their daily paths and the seasons proceeding in order—also dictates the moral law of the world. Because rita represents the underlying structure of reality, it is considered the "law of truth". Consequently, human actions are expected to align with this established cosmic order.12

Ethical conduct is therefore not merely a social convention but a requirement to maintain harmony with the universe. Violating this order through improper behavior, known as anrita, is viewed as a disruption of the cosmic balance, which is considered a sin. By linking these elements, the Vedic worldview emphasizes that righteousness and truth are essential components of the natural and moral fabric of existence.123