From “The Unitary World-Soul” Katha Upanishads

• As the one fire has entered the world
• And become corresponding form to every form,
• So the one Inner Soul of all things
• Is corresponding in form to every form and yet is outside.
• As the one wind has entered the world
• And become corresponding in form to every form,
• So the one Inner Soul of all things
• Is corresponding in form to every form, and yet is outside.
• As the sun, the eye of the whole world,
• Is not sullied by the external faults of the eyes,
• So the Inner Soul of all things
• Is not sullied by the evil in the world, being external to it.
• The Inner Soul of all things, the One Controller,
• Who makes his one form manifold —
• The wise who perceive Him as standing in oneself,
• They, and no others, have eternal happiness!

The Katha Upanishads (500 BC) are part of the Upanishads, a collection of writings considered foundational to Hindu philosophy and mysticism. The Katha is told in the context of the visit of Nachiketa — son of mystic Vajasravasa — to Yama, the Hindu God of Death. Like many of the other Upanishads, the Katha propose to show how the universal spirit (Brahman) and the individual Self (Atman) are understood and distinguished, and also, as in the above passage, how they relate to one another.