Sikhism - Gurudwara Bangla Sahib - There are no idols, statues, or religious pictures in a Gurdwara, because Sikhs worship only God, and they regard God as having no physical form. Nor are there candles, incense, or bells, or any other ritualistic devices. The focus of attention, and the only object of reverence in the main hall (or Darbar Sahib) is the book of Sikh scripture, the Guru Granth Sahib, which is treated with the respect that would be given to a human Guru.