Besides, there is a certain ritual among some dervishes, and they trace its origin to the time of Jelal-ud-Din Rumi, the great Persian poet. It is related how on one occasion Rumi, absorbed in the thought of all life as being one beauty, in the thought of the motion and rhythm of life, began to revolve; and while he circled round and round in front of his pupils, the skirt of his garment as it whirled produced such a beautiful effect that they stored it in their memory for ever after. So the dance celebrates this memory.