The spiritual heart is a chakra, or spiritual centre, that is located in the centre of the chest and houses our spiritual energies and propensities. Sri Chinmoy puts it this way:
"It is better to meditate in the heart than in the mind. The mind is like Times Square on New Year's Eve; the heart is like a lonely cave in the Himalayas. If you meditate in the mind, you will be able to meditate for perhaps five minutes; and out of that five minutes, for one minute you may meditate powerfully. After that you will feel your whole head getting tense. First you get joy and satisfaction; then you may feel a barren desert. But if you meditate in the heart, you acquire the capacity to identify yourself with the joy and satisfaction that you get, and then it becomes permanently yours."

Here is another concentration exercise – a creative visualisation. In this simple exercise, Sri Chinmoy asks us to image a flame inside our spiritual heart: