The third to sixth chapter of the Kaushitaki or Sliankhayan Aranyak of the Rig Veda is called Kaushitaki Upanishad. While the first chapter of the Kaushitaki Upanishad defines heaven (parloka), the second chapter describes the mutual love of supreme or father and son. The third chapter is devoted to life and pragya and the fourth chaptcr teaches about the Supreme Being.