For the next 30 years, accompanied by Bhai Mardana, Guru Nanak undertook four major spiritual journeys, running across India, South Asia, Tibet and Arabia, covering about 30,000 kilometers. In these journeys, he preached the new concept of God as "Supreme, All powerful and Truthful, Formless (Nirankar), Fearless (Nirbhau), Without hate (Nirvair), the Sole (Ik), the Self-Existent (Saibhang), the Incomprehensible and Everlasting creator of all things (Karta Purakh), and the Eternal and Absolute Truth (Satnam)". Guru ji taught people that the 'One' God dwells in every one of his creations, and that all human beings can have direct access to God without the need of any rituals or priests. Setting up a unique spiritual, social and political platform based on equality and fraternal love, Guru Nanak attacked the citadel of the Hindu Caste System, and condemned the theocracy of Mughal rulers. He described the dangers of egotism, falsehood, and hypocrisy, and called upon the people to engage in worship through the "Naam" (the name of God). He rejected the path of renunciation (Tyaga), emphasizing a householder's (family) life based on honest conduct, selfless service (Sewa), and constant devotion and remembrance of God's name. Guru Nanak promoted the equality of all mankind and upheld the causes of the downtrodden and the poor, laying special emphasis to assert the equality of women.
