This is a one of the most celebrated and widely quoted hymn by Guru Gobind Singh, the tenth Sikh Guru. He shows in the following Shabad the qualities that makes one fit to become part of his world mission called the Khalsa Panth - To live with courage and bravery to the highest levels of righteousness The hymn is a part of Chandi Charitar Ukti Bilas, a section of the Dasam Granth. Here the word "Shiva" may be taken to mean Lord Shiva but this is incorrect. In Sikh tradition uses the terms Shiva, Hari, Rama etc. in a nirguna sense to mean the one Lord Almighty.