The seventh brahmana discusses how and why the soul interconnects and has the oneness through all organic beings, all inorganic nature, all of universe. It asserts that the soul is the inner controller of beings, conflated with the interaction of nature, psyche and senses, often without the knowledge of beings. It is the soul, nevertheless, that is the true and essence, states the Upanishad. The ninth brahmana, the longest of the third chapter, introduces the "neti, neti" principle that is discussed later, along with the analogical equivalence of physical features of a man and those of a tree, with the root of a man being his soul. The last hymns of chapter 3 in Brihadaranyaka Upanishad also attest to the prevalent practice of the renouncing ascetic life by the time Brihadaranyaka Upanishad was composed in Vedic age of India, and it is these ascetic circles that are credited for major movements such as Yoga as well as the śramaṇa traditions later to be called Buddhism, Jainism and heterodox Hinduism.