CONCEPT OF GOD IN ZOROASTRIANISM:

God in Zoroastrianism is known as 'Ahura Mazda'. 'Ahura' means 'The Lord' or 'The Master' and 'Mazda' means 'the Wise'; hence 'Ahura Mazda' means 'the Wise Lord' or 'the Wise God'. Ahura Mazda stands for God, in a strictly monotheistic sense.
Qualities of God according to the Dasatir:

According to the Dasatir, Ahura Mazda has the following qualities:
(I) He is One.
(ii) Nothing resembles Him.
(iii) He is without an origin or end.
(iv) He has no father or mother, wife or son.
(v) He is without a body or form.
(vi) Neither the eye can behold Him, nor the power of thinking can conceive Him.
(vii) He is above all that you can imagine.
(viii) He is nearer to you than your own self.