Khratu, kratu as the Self of all in the poetic gathas and the Upanishads
The philosophy of the Upanishads is called Vedanta, “the conclusion, end of the Veda or Wisdom.” Among the Upanishads, the Isha Upanishad shows a spiritual vision very similar to the poetic gathas. It is highly likely that the Isha and some other earlier Upanishads such as Kena, have been influenced by the poetic gathas of the ancient Aryan Prophet Zarathushtra.
The common link between the poetic gathas and the older Upanishads lies in the concept of khratü or Vedic kratú as the Self of all.
Avestan khratü or Vedic kratú is the power of spirit/mind; the triumph of the will power. Khratü is the passion, energy associated with wisdom and vision; the seer-will endowed with the power/force to manifest visions, create, and do work.
khratü comes from the Proto Indo European base kar-/ker “to have power, bring forth, create.” Greek kratos “rule, power,” Greek kratia “have power over, Old English cræft , Dutch kracht, German Kraft, Icelandic kraftur, Old Norse kraptr all come from the same root and mean originally “having power to create, bring forth, manifest.”
I shall add that in Yasna 40.1, in the second rhymed verse line; khratü appears as Khrapaití.”
Hence, Lommel’s translation of khratü as “Geisteskraft” or the power of spirit/mind to create/manifest is a very accurate translation.
In khratü, vision, wisdom and power are one. There is one and only one original principle. This Supreme Principle is the creative power of spirit and vision called khratü.
Thus whatever secures the “creativity or freedom of the spirit” is philosophy or love of wisdom in the poetic gathas and the older Upanishads. The self of all, the self of this universe and other worlds seen and unseen, is the freedom and creativity of the spirit/mind.
Mazdyasna or the love of wisdom is the odyssey of spirit/mind, the journey of the seer-will or khratü to progress through different levels of consciousness, to explore the infinite horizons of creativity, and evolve into ever more perfect types of life and existence.
I would like to conclude by the first occurrence of khratü in the poetic gathas namely Yasna 28.1, 3rd rhymed verse line;
“Through the power (khratüm) of an awe-inspiring spirit/mind to create;
I shall delight the soul of the living universe.”