2. That, from where all the activities of the embodied beings emerge, is mentioned as the heart. The description of its form is conceptual. - Ramana Maharshi

16. Without seeing the origin of light, the true form of one's Self, the ordinary man sees by the mind different things and is deluded.

39. Bondage and Liberation are mere notions in the mind: they cease when he who is bound is inquired into and realized.

Since you are awareness there is no need to attain or cultivate it. All that you have to do is to give up being aware of other things, that is of the not-Self. If one gives up being aware of them then pure awareness alone remains, and that is the Self.