Question: If you feel warmth in the region of the heart, is this a sign of the heart centre opening up?

Sri Chinmoy: If you feel heat and the rotation of a disc at the centre of the chest, then it is a sign that the centre is being opened. Doctors say that the physical heart is somewhat to the left of the chest, but the spiritual heart is in the middle of the chest. When the heart centre actually opens, its joy and delight will spread to the whole body so that you cannot actually say that it is located at any specific point.

From:Sri Chinmoy,Kundalini: the Mother-Power, Aum Press, 1973
Sourced from https://srichinmoylibrary.com/kmp