“The nativity mystery “conceived from the Holy Spirit and born from the Virgin Mary”, means, that God became human, truly human out of his own grace. The miracle of the existence of Jesus , his “climbing down of God” is: Holy Spirit and Virgin Mary! Here is a human being, the Virgin Mary, and as he comes from God, Jesus comes also from this human being. Born of the Virgin Mary means a human origin for God. Jesus Christ is not only truly God, he is human like every one of us. He is human without limitation. He is not only similar to us, he is like us.”
― Karl Barth, Dogmatics in Outline
Lillie-Put 
How do you come to the conclusion that “God became human” when the young girl (Myriam/Miriam/Mary/Maria) became pregnant from a child without sexual contact with any being?
Where in your Bible can you find such a thing?
Good question although I think you probably know what I am going to say and have already made up your mind on the subject. More than likely your question here is more to say you believe Jesus was just a spirit being which of course is part of the gnostic heresy that rose up almost as soon as the church did. But Jesus was a man just as we are John 1:14 confirms that as does Hebrews 4:15. Yet he was also God again according to John chapter 1 and the book of Colossians. How can a man be 100% man and 100% God? That is beyond me but the Bible teaches all kinds of paradoxes and part of our faith is to come to terms with those paradoxes from our admittedly limited perspective.
That Jesus would be human without limitation is contradicted in the same proof of him not being God, by him not knowing everything and having to learn everything, plus being able to be tempted and by being able to die and to come into hell for three days.
God knows everything, has no beginning (= not born) has no end (= can not die) plus according to the Bible is an eternal Spirit Who can not be seen by man or they would die. Jesus was seen by many, who did not fall death, and even took some out of dead and proofed after his resurrection out of the dead, that he was not a Spirit..
Ah I see perhaps it is not agnosticism but Arabism here. Jesus was both God and man. Again John 1 and Philippine 2:16 teach that He was God.
Sorry that should read gnosticism.
Pingback: Build me a house | daily meditation