14. Just as the sun gives light to the moon this heart bestows the effulgence on the mind. - Ramana Maharshi

11. The macrocosm is in its entirety in the body. The body is in its entirety in the heart. Therefore heart is the summarised form of all the macrocosm.

38. The sense of doership reaps the fruits of action (karma): karma ends when the doer realizes his true nature.

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.