The philosophies of Samkhya and Yoga were popular as early as 1500 BC in ancient India, where as the Bhagavadgita, whose exact date of composition is not clearly known, became popular during the Gupta period (300 - 500 AD) as a consequence of the revival of Brahmanical religion. Technically speaking the Samkhyayoga of the Bhagavadgita is a subtle integration of some important aspects of both Samkhya and the Yoga from a positive and theistic perspective. The concepts of Samkhyayoga presented in the Bhagavadgita are common to many schools and sects of Hinduism and therefore cannot be said with certainty that they were derived directly from these two schools. However, the use of the terms "samkhya" and "yoga" and the inclusion of a whole chapter (Chapter 2) with the same title suggest to the importance given by its author to these two ancient philosophies and their popularity at the time of its composition. The Samkhya Yoga of the Bhagavadgita is theistic without the technicalities of the Yoga and the atheism of Samkhya. There is also a speculation as to whether the Samkhya philosophy was atheistic at all. In all probability there were two schools of interpretation with in Samkhya as in case of Buddhism, one atheistic and one theistic, and the latter seems to have been used as a model by the scholars of Vedanta to base their own arguments. Some concepts of the Bhagavadgita that bear some resemblance to those of the theistic Samkhya and Yoga are discussed below


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