Taking a pot shot at the Shiv Sena and the Maharashtra Navnirman Sena (MNS) for their campaign against non-Maharashtrians in Maharashtra, spiritual leader Sri Sri Ravi Shankar Thursday said that Bal Thackeray and his family are in need of the Art of Living course to soothe their nerves.

"I think the Shiv Sena and the MNS should take some rest and follow the Art of Living regime to calm themselves," Shankar told reporters here.