"Having understood and known that there is this Atman that is beyond the intellect, thereafter establish the mind in the Atman. It is the Atman which makes the whole mind luminous, and which makes it possible for you to know everything. The Atman is you, the consciousness. In the light of your consciousness the whole universe is lit, just like the dream world which not only exists in your consciousness, but is lit by it too. In the consciousness, the entire universe is being perceived by you. The mind and the intellect are all being perceived by you in the consciousness of the Atman. Thus having known, establish or fix your mind, in the Self, the Atman. Establish your awareness in the Atman with a mind which has undergone spiritual regeneration." [From "Wisdom in Action", By Swami Yogeshwarananda Giri]
"He who abides in the earth is distinct from the earth, and the earth knows nothing of him, his body is the earth, inwardly he moves the earth, it is the Atman, the inner engine immortal. He who abides in water, who abides in fire, who abides in the sun, moon and stars, who abides in lightning and thunder, who abides in all worlds, who abides in all Vedas, who abides in all sacrifices, who abides in all beings, who is different from all beings, who is not known. by all beings, who within moves all beings, is Atman, the inner engine, immortal." [Upanishads]
See Also
Alchemy - Glossary of Terms
Atma
Christ Consciousness
Cosmic COnsciousness
God
Mind
Mind Force
Whole Mind