In the fifteenth century another great teacher emerged in northern India, this was Guru Nanak, his followers were named Sikhs, meaning disciples, seekers of the truth and students. The understanding of their path is that of not another religion, but a statement of universal truth within, transcending all religions. Sikhism has its own unique quality and history. Sikhism does not seek converts, it shows the universality of spiritually. The Sikhism focus is one of loving devotion to one God and it is the Same One who is worshipped in many different names around the world. The One they know is harmless, beyond space and time, the only truth and the only reality. The concept of this was derived from Guru Nanak's Mool Mantra ('basic sacred chant') and introduces the Guru Granth Sahib and Jap Ji, the first morning prayer of Sikhs. The Sikhs may refer to God as Sat (meaning 'truth') or as Ik Onkar, the one Supreme Being. God is a pure being without attributes. A true Sikh is to live a disciplined life of surrender and devotion to God, which consists of daily prayer, continuous inner repetition of the name of God, also detachment from negative worldly mind states. Also, one's mind and heart are joined with God.