Sri Ramana Maharshi said that he gave the location of the Heart in the right side of the physical chest for those who were still identified with their body. He was clear that in absolute reality our mutual One-Self cannot be located, limited, or confined to a single place in the body.
Self-inquiry differs from all other meditations that I'm aware of because all the others require us to dedicate a period of time to their practice, need a quiet place, entail closing our eyes, and demand the removal of external distractions to be fully effective – or even able to be performed at all.
Self-inquiry has been increasingly coming into human consciousness for around 100 years or so, since Sri Ramana Maharshi began teaching it in the early part of the last century. People flocked from all over India and even from Europe and America to sit with him. And gradually his message began to spread.
The existence of ego is a myth. In reality there is no actual entity called an "ego" (a noun), there is only the mental activity, the process, of egoity (a verb). Ego is nothing more than an imagined identity, simply a collection of thoughts many people believe to be who and what they are ...