your feeling 'I Am'
you are That
The Self is existence, indivisible consciousness, a spiritual reality (Being) without space. Your awareness, spirit, the feeling 'I Am' (I exist). Self-existent, immortal, existence dreaming experiences. Christos (Christ-consciousness), the Tao, Buddha Mind, Allah, Wahe Guru, Parmatama, Brahman, Ein-Sof, etc are all different labels for the Self.
Soul truth (atma vidya) purifies the mind so in silence you realize your true Self as consciousness. Anchored in Truth like a lion, spiritual living flows out naturally as unconditional love. Mind empty of concepts, all that remains is the simple ever-still awareness 'I Am' (I exist). Mystics conclude birthless existence is ultimately a mystery, perhaps even unto it Self.
On account of the indivisibility of consciousness, I am you and you are me, but the indivisible consciousness Itself has become neither I nor you! When the wrong notions of 'you' and 'I' are given up, there arises the awareness that there is neither you, nor I, nor everything: It alone is everything. - Yoga Vasistha