'There is none God. He is the Supreme Truth.' This is the central belief, the mool mantra, of the Sikh religion, founded in Punjab by Guru Nanak (1469-1539), who drew upon hte teachings of Muslim Sufis and Hindus Bhaktas. The common basic factor of the Sikh community is belief in hte ten Gurus and the authorized version of the Guru Granth Sahib, the holy scripture. In its purest from, Sikhism is about unity, simplicity, equality and surrender (to God), and the verses of the Gurus-most of them included in the Granth Sahib-articulate this beautifully.