The Light of Divine Guidance: The Messages from the Guardian of
the Bahá'í Faith to the Bahá'ís of Germany and Austria
(Hofheim-Langenhain: Bahá'í-Verlag, 1982), 71
The Upanishads contain the highest
form of philosophical introspection in Hinduism and and are seen as
perennial sources of spiritual knowledge.
The Upanishads more clearly set forth the
prime Vedic doctrines like Self-realization, yoga and meditation,
karma and reincarnation, which were hidden or kept veiled under the
symbols of the older religion. The older Upanishads are usually
affixed to a particular Veda,
but the
more recent ones are not. It is believed by many
people that the Upanishads became prevalent some centuries before the
time of Krishna and Buddha.
The Kaushitaki is an early Upanishad
that is considered to be
among the more important.