Sages have called this by many names—God, Pure Spirit, I AM THAT
AM, Absolute Reality, the Nondual Self, Brahman/Atman, Being-Awareness-Bliss, Tao, Unborn Buddha-nature, Dharmakaya, Zen Mind, Clear Light, the One, and so on.
Awareness, while being entirely open, transcendent, formless, changeless, timeless, spaceless, and world-less, is also THIS which is right now looking, hearing, touching, smelling, tasting, thinking, intuiting. Awareness has also manifested ItSelf as all these sensible/perceptible objects—namely, the various sights, sounds, textures, smells, tastes, thoughts, memories, emotions, psychic impulses and other momentary arising-vanishing formations or phenomena.
Awareness is thus WHO YOU REALLY ARE and EVERYTHING EXPERIENCED, that is to say, Awareness is WHAT EVERYTHING ESSENTIALLY IS.
You cannot know, perceive, find or grasp Awareness as an object of experience, since Awareness is fundamentally not an object. Rather, Awareness is the eternal Subject (one might even say: Awareness is THIS which subsumes and transcends the subject-object split). Therefore, YOU can only BE Awareness, abide as THIS Awareness, remain as THIS, flourish as THIS, shine as THIS, and freely function from THIS Awareness. You cannot touch or look at formless Awareness, just as a fingertip cannot touch itself or the eye cannot directly see itself.
In short, though Awareness is not knowable or perceivable as an object, Awareness is quite live-able and be-able, because YOU ARE THIS AWARENESS.