Mary is the Mother of God

  I can hear your collective groans.  "That would mean she's God's origin"!  Nope.  Put down your torches and pitchforks.  Think about this logically.  Jesus is God.  (John 20:28, Phil 2:6, John 1:1-14, amongst others).  Mary is his mother. (Luke 1:31).  Therefore, since Jesus is God, and Mary is his mother, Mary is the Mother of God. See how easy that is?
I bring this up because I know a priest that doesn't care for this phrase.  I think it's not precise enough, but it's completely accurate. I agree with him that Theotokos (God-bearer) is a better description, but I think he's making the same mistake Nestorius did with the term "Theotokos".  God does have a mother, as God choose to be born as a boy to a humble Jewish woman.  God was brought up a good Jewish boy, by a good Jewish mother, and died a very painful death.  If God died (which orthodox theologians agree to), then what in the world is wrong with saying Mary is the Mother of God?  Okay, I'll end right here, through the prayers of the Mother of God, O Saviour, save us.