In the beginning my dear, this universe was Being (Sat) alone, One only without a second…It (being, or Brahman; there is nothing higher than Brahman Bhagavad-Gita 13;12) thought; May I be many; may I grow forth. It created fire. (Light) That fire thought; May I be many; may I grow forth. It created water. Chhandogya Upanishad Chapter 2 – Brahman, the cause of life.