Isha Upanishad

The isha Upanishad is one of the more ancient of the Vedantic writings in style, substance and versification, subsequent certainly to the Chhandogya, Brihadaranyaka and perhaps to the Taittiriya and Aitareya, but certainly the most antique of the extant metrical Upanishads. The Isha belongs to the earlier or Vedic group. It is already face to face with the problem of reconciling human life and activity with the Monistic standpoint and its large solution of the difficulty is one of the most interesting passages of Vedantic literature.