Ephesians 1:10

"with a view to an administration suitable to the fullness of the times, that is, the summing up of all things in Christ, things in the heavens and things on earth in Him." Eph 1:10 (NASB)

God gave Christ at exactly the right time, He knew exactly when to send His Son to the world. In doing this He summed up all things from the beginning of time to the end of time. All prophecies, all covenants, all promises fulfilled in one single gift.