Therefore the Lord himself shall give you a sign; Behold, a virgin shall conceive, and bear a son, and shall call his name Immanuel. – Isaiah 7:14
The Lord gave us a sign that He sent our Saviour, that He sent Son by conceiving a child within the womb of a virgin. God prophesized this through Isaiah decades, centuries, before the birth took place. It goes to show us that God truly has everything planned ahead of time even our lives.