"God has no mother: No beginning of days or end of life."
Mary is the Mother of Jesus. Jesus was and is God. He has two natures. Mary is not the mother of a nature, but a person. Thus, we are going to have to move away a little from your incredibly rigid interpretations of the Bible (like "there is no 'mother of God' in my Bible").
The word "Bible" is not in the Scriptures, either. I guess we can't believe in it, according to that logic.
Regards
"Mary is the Mother of Jesus. Jesus was and is God. He has two natures. Mary is not the mother of a nature, but a person."
The Lord must have known this discussion would require my further input, allowing me a few hours near the PC this morning.
You say "Jesus was and is God" and that "he has two natures". Correct. Mary mothered the sacrifice that was sinless (sinless because God was his father). The human (fleshly) nature that Mary gave birth to was "in all points tempted like as we are, yet without sin (Heb. 4:15)". How was he not born in sin, or how did he not ever sin? The Father in him. The Divine nature.
Mary did not create more of God. That's ridiculous theology.
God could not redeem mankind, he is a spirit (John 4:23,24). Therefore he had to make a sacrifice. Abraham said it best: "God will provide himself a lamb for a burnt offering" Gen. 22:8.
Sacrifice, burnt offering? Some death and destruction going on here. But God cannot even be weakened, let alone die.
"God was in Christ, reconciling the world unto himself". 2 Cor. 5:19.
"That in the dispensation of the fulness of times he might gather together in one all things in Christ (the image of the invisible God, Col. 1:15), both which are in heaven, and which are in earth; even in him." Eph. 1:10
And we know that the image is not the Creator, because the "things which are seen were not made of things which do appear". Heb. 11:3.
Once again, Mary didn't create more of God. She was blessed in being used to help provide the flesh and blood atonement.
By holding the belief that Mary is the mother of God, one puts her in equal status with God, who said: "..before me there was no God, neither shall there be after me. I, even I (not we) am the Lord; and beside me there is no saviour". Isaiah 43:10,11. I like Isaiah; lots of good, firm, Godhead statements.
There are plenty of folks that see that God has manifest himself in numerous ways; voice from heaven, burning bush, cloud, pillar of fire, and in these last days, as the only begotten (begotten denotes a beginning) son. But there are some that simply believe the Word of God (commonly refered to as the Bible) is clear. Mary is not the mother of God.