Oneness, as the term implies, refers to the concept of non-separation, the idea that all beings and phenomena are interconnected and not separate from each other or from the ultimate reality. As both Adyashanti and Nirmala point out, it isn't a state or a thing to acquire; it's already the innate nature of reality.

From Adyashanti's perspective:
1) Oneness is simple and obvious. It's the essential reality beneath all our ideas and concepts.
2) Perceiving it often involves deconstructing or letting go of false perceptions, rather than acquiring new ones.
3) Acknowledging oneness brings an end to the erroneous insistence on separateness.

Nirmala, on the other hand, emphasizes:
1) Oneness can be experienced individually but also has the potential to transform how we interact with the world.
2) It's an opportunity in every moment to recognize deeper truths about ourselves and others.
3) Embracing oneness means embracing everything with respect for its intrinsic worth, leading us beyond illusions of separation.

So, oneness isn't an achievement but rather an unveiling of what has always been true. It's like realizing you're not just a wave on the ocean, but fundamentally part of the ocean itself. You're not detached from other waves (people, experiences, the cosmos), but intrinsically linked in the grand, mysterious dance of existence.