Rumi’s poetry sought to explain a Heavenly love which flowered in his soul,. The practice of whirling is a technique Sufis believe can actually open that love.
Sufi whirling is a form of Sama or physically active meditation through which dervishes (those who practice whirling, who seek to reach the source of all perfection).
This is sought through abandoning one’s egos or personal desires, by listening to the music, focusing on God, and spinning one’s body in repetitive circles, which has been seen as a symbolic imitation of planets in the Solar System orbiting the sun.
Whirling the body represents the earth and the heart represents the sun. As the earth rotates around the sun, the Divine is showing you that when you are moving towards that process of enlightenment you will find God present in your heart.
The focus in Sufism is always on the heart. Other systems focus on different chakras and different endocrine centers, but these are all of secondary importance in comparison to the heart chakra. If the heart is sick, the whole body will be sick because the heart is the source of all power and energy in the body.