Sufis, who had received spiritual training from all previous prophets and leaders, likewise received training from Mohammed. The openness of Mohammed's essential teachings paved the way for them to come forward into the world without the interference they had previously experienced, and a mystic order called the Saheba-e-Safa, Knights of Purity, was inaugurated by the Prophet, and afterwards was carried on by Ali and Siddiq. The lives of these knights were extraordinary in their wisdom, piety, bravery, spirituality, and great charity of heart. This order was carried on by their successors, who were called Pir-o-Murshid, Shaikh, etc., one after another, duly connected as links in a chain.