Bhai Mallo and Bhai Manga were devoted disciples of Guru Nanak Dev ji, who had learned to recite the hymns of Guru Sahib and interpret Gurbani. They came to Guru Nanak Dev ji and sought wisdom and enlightment, which could liberate them from ignorance . On the other hand to control the mind and concentrate on God's presence by listening to the sermons of divine wisdom and singing the sacred hymns of the perfect and interpreting them is Rajasic Tapasya