In Sikhism God is Sargun (all attributes) meaning all things you see around you. God is also Nirgun (no attributes) meaning nothing around you. So God exists and doesn't, at the same time! What does that tell you? That you can not believe in God all you want and still believe in him. And you can believe in him all you want and still not believe in him. That kind of makes every Sikh an atheist. Sargun is nature of the three lower worlds - the realm of maya from which springs the trinity of Brahma, Vishnu and Shiva. They are not beyond the regions of time and space. That's why they keep on re-incarnating because they cannot get mukti. Anybody following them cannot cross the borders into the lights of Sat Lok.
Guru Nanak Ji says,
Jay sao chanda ughvai,
Sooraj Charray Hajjar,
Eitay Channan Hundiya,
Gur Bin Ghor Andhar.
Only Guru (who is beyond the clutches of Maya,) can take souls out of the cycle of trans-migration. The realm of Brahma - mind region is so bright that its brilliancy exceeds a thousand suns and moons. But this brilliance is nothing (darkness) in comparison to Sach Khand. Without a guru, Brahma's region is mesmerizing enough to trap soul for eons, making one think that this is the final destination which we call home.
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I guess same implements on Hindu's also, like Jackdaws mentioned above.
