Sufi dance is essentially to rotate around your own axis and through this movement you can alternate between states of consciousness and mystical ecstasy. The purpose is facilitate your soul to emerge from earthly ties and into the kingdom of God. The main dancer may also represent the sun while the others represent the planets, as in our solar system.
The purpose is to "not to seek love, but merely to seek & find all the barriers within yourself that you have built against it."
To be free we must learn let go, learn to "let the beauty of what you love be what you do."