Luke 1:35: Conceived by the Holy Spirit
Mary's question about how she could conceive gets an answer that points to God's action, not her own. The angel names the Holy Spirit and the power of the Most High as the decisive cause, and grounds it all in what God has spoken.
Hebrews 1:1–4: God's Final Word in the Son
God has spoken at many times and in various ways, but now he speaks in a Son. This article opens Hebrews 1:1–4 to show why that Son is God's climactic word and not one voice among many.
Mark 1:1 says the gospel is news about Jesus
The Gospels are not collections of general religious advice. They are written testimonies to a person, and Mark opens by announcing that the story of Jesus has a definite beginning in history.
The virgin birth and its theological significance: A Biblical Guide
Luke presents the virgin birth not as a wonder added for effect but as the way he explains who Jesus is before he explains what Jesus does. The child born of Mary is genuinely human and uniquely the Son of the Most High.