Traditional Sikhs use quotations by Bhai Gurdas, whose "Vaaraa," or "Ballads," were considered by Guru Arjan as a key to understanding the concepts of the Guru Granth Sahib as saying, wherever Guru Nanak went and debated the futility of yoga, the yogis gave up at least some ritualistic aspects of their yogic paths. The yogis of "Gorakhmatta," meaning "Wisdom of Gorakhnatha," the founder of Hatha yoga, converted to the path of Guru Nanak, and also changed the name of their ancient center to Nanakmatta meaning "Wisdom of Guru Nanak," known today as Gurdwara Sri Nanakmatta Sahib. Some claim yoga is refuted in the Guru Granth Sahib. However, Guru Granth Sahib praises yogic practice, describing the Guru as a Yogi in lines such as "Raj Jog Takhat Deean Guru Ram Das" and "Jo Jo Deesai So So Rogi | Rog rahit mera satigur jogi" meaning "Guru Ram Das is given the throne of Raj Yoga", and "Everyone I see has sickness. My true Guru, the yogi, does not".