include the words of non-Sikh bhagats, some who lived and died before the birth of Nanak, and whose teachings are part of the Sikh scriptures. The Adi Granth and successive Sikh gurus repeatedly emphasised, states Mandair, that Sikhism is "not about hearing voices from God, but it is about changing the nature of the human mind, and anyone can achieve direct experience and spiritual perfection at any time". Historical influences The roots of the Sikh tradition are, states Louis Fenech, perhaps in the Sant-tradition of India whose ideology grew to become the Bhakti tradition. Furthermore, adds Fenech: The development of Sikhism was influenced by the Bhakti movement; however, Sikhism was not simply an extension of the Bhakti movement. Sikhism, for instance, disagreed with some of the views of Bhakti saints Kabir and Ravidas. Sikhism developed while the region was being ruled by the Mughal Empire. Two of the Sikh Gurus, Guru Arjan and Guru Tegh Bahadur, refused to convert to Islam and were tortured and executed by the Mughal rulers. The Islamic era persecution of Sikhs triggered the founding of the Khalsa, as an order for freedom of conscience and religion. A Sikh is expected to embody the qualities of a "Sant-Sipāhī" a saint-soldier. Growth of Sikhism After its inception, Sikhism grew as it gained converts among Hindus and Muslims in the Punjab region. In 1539, Guru Nanak chose his disciple Lahiṇā as a successor to the Guruship rather than either of his sons. Lahiṇā was named Guru Angad and became the second Guru of the Sikhs. Nanak conferred his choice at the town of Kartarpur on the banks of the river Ravi. Sri Chand, Guru Nanak's son was also a religious man, and continued his own commune of Sikhs. His followers came to be known as the Udasi Sikhs, the first parallel sect of Sikhism that formed in Sikh history. The Udasis believe that the Guruship should have gone to Sri Chand, since he was a man of pious habits in addition to being Nanak's son. Guru Angad, before joining Guru Nanak's commune, worked as a pujari (priest) and religious teacher centered around Hindu goddess Durga. On Nanak's advice, Guru Angad moved from Kartarpur to Khadur, where his wife Khivi and children were living, until he was able to bridge the divide between his followers and the Udasis. Guru Angad continued the work started by Guru Nanak and is