The evolution in Kathak dance theme during the Bhakti movement centered primarily around divine Krishna, his lover Radha and milkmaids ("gopis") – around legends and texts such as the Bhagavata Purana found in the Vaishnavism tradition of Hinduism. The love between Radha and Krishna became symbolism for the love between Atman (soul within) and the supreme source (Cosmic soul everywhere), a theme that dance ballet and mimetic plays of Kathak artists expressed. Although central asian influence of Kathak rapid whirls has been proposed, Sangitaratnakara, a 13th century Sanskrit text on Indian classical music and dance in Chapter 4 mentions a dance movement with rapid whirling around like a wheel keeping the arms in the Dola pose and bending the body inwards called 'Cakramandala' It is employed in worshipping gods and in vigorous movement.