On top of it sits a spiritual subtlety, the Spiritual Heart Qalb. Once initiated with divine energy and enlightened, its function is communication with God. The heart, being a pumping station, circulates the light-oriented blood all over the body. As a result of this, not only does the heart get enlightened but also the whole body and all the subtleties enclosed in the body. It is, in a sense, spiritual rebirth. It does not matter what name of God is used in this process.