The Vedas describe ultimate reality as having an impersonal omnipresent aspect (Brahman) and an personal omnipresent aspect (Paramātmā), but ultimately is a person who is the origin of reality (Bhagavān).
SB 1.5.20: The Supreme Lord Personality of Godhead is Himself this cosmos, and still He is aloof from it. From Him only has this cosmic manifestation emanated, in Him it rests, and unto Him it enters after annihilation. Your good self knows all about this. I have given only a synopsis.
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Experience includes both true and false concepts, but only truth is in the form of Bhagavān. Brahma-saṁhitā states:
BS 5.32: I worship Govinda, the primeval Lord, whose transcendental form is full of bliss, truth, substantiality and is thus full of the most dazzling splendor. Each of the limbs of that transcendental figure possesses in Himself, the full-fledged functions of all the organs, and eternally sees, maintains and manifests the infinite universes, both spiritual and mundane.
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Being full of truth means having no place for falsehood, which is maintained apart from Bhagavān. False concepts are in Him the like you're in the Sun when exposing your body to sunshine.
RE: The Ultimate Reality Is That Which Has No Outside