1. God is the name given to the power that is the source of and sum total of all energy and intelligence in the universe. Different religions give different names to this supreme source, on the basis of their perception of this power. Thus, though the power is the same, its perception is different and hence the different names of God. Zoroastrians refer to this power as Ahura Mazda, as they perceive it to be the all intelligent creator of life.
2. In Zoroastrian religion, God is referred to as spirit among spirits. He cannot be seen either by men or divine beings. God does not have any shape or form, as He is essentially energy and it is not possible to see energy in any form.
3. Even energies from physical sources like electric energy, magnetic energy or wind energy cannot be seen. Yet, we believe in their existence. We essentially know about the existence of these energies through the work that they do.
4. The intrinsic order inherent and underlying in the universe, is also a compelling reason to reinforce a belief in God. If one notices, there is nothing random in the universe. The universe and our world is perfect, symmetrical and systematic, running on immutable laws. There is an intelligence that has conceived it, planned it, and that runs it. That intelligence is God. That macrocosmic intelligence is reflected in the microcosmic intelligence of every atom in every creation and every cell in every living organism. e