'BRAHMA VIDYA' - 'HRUDAYA VIDYA' or 'ATHMA VIDYA' is nothing but the science of "I"-AM ness'~ Swaathmaaraaman

Consciousness is the sense of knowingness ‘I am’ without words,
and it appeared unknowingly and unsolicited. Only in the realm of
knowingness ‘I am’ – the consciousness – can a world be, and so
also an experience. Hold on to this knowingness ‘I am’ and the
fount of knowledge will well up within you, revealing the mystery
of the Universe; of your body and psyche; of the play of the five
elements, the three ‘gunas’ and ‘prakriti-purusha’; and of
everything else. In the process of this revelation, your
individualistic personality confined to the body shall expand into
the manifested universe, and it will be realized that you permeate
and embrace the entire cosmos as your ‘body’ only. This is known
as the ‘Pure Super-knowledge’ – ‘Shuddhavijnana’.

NISARGADATTA MAHARAJ