Guru Nanak was thoroughly familiar with the politico-administrative arrangements made by the Afghan rulers, particularly in the Punjab. Guru Nanak invites people to come out of the shells of their castes as individuals to tread the path of truth; he encourages the lowest of the low to feel confident of his spiritual regeneration. Guru Nanak's attitude towards the traditional Hindu deities and scriptures is intimately linked up with his attitude towards the pandit. Guru Nanak gives as much attention to the jogi as to the pandit, and he is equally familiar with the beliefs and practices of both. God, for Guru Nanak, is the eternally unchanging Formless One. He has no material sign; He is inscrutable; He is beyond the reach of human intellect. In the process of man's union with God, an important experience is visamdd, the awe-inspiring vision of God's greatness and the feeling of ecstasy resulting from it.