Rta

In the Vedic religion, Ṛta (Sanskrit ऋतं ṛtaṃ "that which is properly/excellently joined; order, rule; truth") is the principle of natural order which regulates and coordinates the operation of the universe and everything within it. In the hymns of the Vedas, Ṛta is described as that which is ultimately responsible for the proper functioning of the natural, moral and sacrificial orders. Conceptually, it is closely allied to the injunctions and ordinances thought to uphold it, collectively referred to as Dharma, and the action of the individual in relation to those ordinances, referred to as Karma – two terms which eventually eclipsed Ṛta in importance as signifying natural, religious and moral order in later Hinduism. Sanskrit scholar Maurice Bloomfield referred to Ṛta as "one of the most important religious conceptions of the Rig Veda", going on to note that, "from the point of view of the history of religious ideas we may, in fact we must, begin the history of Hindu religion at least with the history of this conception".

Ṛta is derived from the Sanskrit verb root ṛ- "to go, move, rise, tend upwards", and the derivative noun ṛtam is defined as "fixed or settled order, rule, divine law or truth". As Mahony (1998) notes, however, the term can just as easily be translated literally as "that which has moved in a fitting manner", abstractly as "universal law" or "cosmic order", or simply as "truth". The latter meaning dominates in the Avestan cognate to Ṛta, aša.

The term appears in Vedic texts and in post-Vedic texts, both as Ṛta and derivatives of the term. For example, in the 2nd-century BCE text Mahabhasya of Patanjali, he explains Ṛtaka to be the grammatically correct form of name for a son, where then the name would mean "truthling".

Oldenberg (1894) surmised that the concept of Ṛta originally arose in the Indo-Aryan period from a consideration of the natural order of the world and of the occurrences taking place within it as doing so with a kind of causal necessity. Both Vedic Ṛta and Avestan aša were conceived of as having a tripartite function which manifested itself in the physical, ethical and ritual domains. In the context of Vedic religion, those features of nature which either remain constant or which occur on a regular basis were seen to be a manifestation of the power of Ṛta in the physical cosmos. In the human sphere, Ṛta was understood to manifest itself as the imperative force behind both the moral order of society as well as the correct performance of Vedic rituals. The notion of a universal principle of natural order is by no means unique to the Vedas, and Ṛta has been compared to similar ideas in other cultures, such as Ma'at in Ancient Egyptian religion, Moira and the Logos in Greek paganism, and the Tao.

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