God spoke in times past of the One that would come and destroy Satan’s hold on man. He also set times of visitation that would come to pass.
The birth of the Messiah of Israel and Savior of the world was one of those predetermined times.
Jesus, the Son of God, born of a virgin came at the appointed time to fulfill His work as the sacrificial Lamb of God.
And all that dwell upon the earth shall worship him, whose names are not written in the book of life of the Lamb slain from the foundation of the world. Revelation 13:8 KJV
The next day John seeth Jesus coming unto him, and saith, Behold the Lamb of God, which taketh away the sin of the world. John 1:29 KJV
Saying with a loud voice, Worthy is the Lamb that was slain to receive power, and riches, and wisdom, and strength, and honour, and glory, and blessing. Revelation 5:12 KJV