Jesus didn't come into existence in a manger in Bethlehem. Jesus wasn't created at Mary's conception. Jesus has always been. Jesus is The Word, the Angel of the Lord, and Jesus has no beginning, just as the Father has no beginning, just as the Spirit has no beginning. Jesus was there at creation.
Don't miss the significance of this nor shortchange the true nature of the Trinity.
Genesis 1:1-2 and John 1:1-5