Living in a three dimensional universe, (or four-dimensional if you consider spacetime), something transfixing occurred at what the Bible calls, "the fullness of time." Galatians 4:4.
Jesus stepped in and defined all things according to Himself.
The "fullness of time" concept is then used by the Apostle Paul (Ephesians 1:10) to describe that point in time when all things in reality are to be concluded, again according to and in reference to Jesus, the eternal "I Am" of all things definable and indefinable.
Thus He Himself assumes the term "Alpha and Omega", (Revelation 1:8 cf. 22:13). Prior to this point in redemptive history, that designation was reserved for God (Jehovah) alone, (Isaiah 41:4).
In Jesus we have progress as well as the center point and hub of the human experience. In Him is the beginning and end of all things and the nucleus of definition, an eternal reference point.