Apart from the Lord Jesus Christ who is the chief apostle, there are some three main divisions in this apostle realm, which we must remember.

Firstly, it is the foundational apostles who wrote the Scripture by inspiration of the Holy Spirit. These apostles lived no more after the first century and there can be no other apostle of this type.

Secondly, there were the twelve apostles chosen by the Lord Jesus Himself and sent out in apostolic mission of whom Judas Iscariot became the betrayer of Jesus later and Matthias replaced him by the Lord's sovereign choice through casting lots (Luke 6:12-16; Acts 1:23-26; Prov 16:33). These twelve are unique in their calling that will be given to no other person because these twelve have been chosen to symbolically become the twelve foundations of the wall of the holy city of New Jerusalem. On these twelve foundational apostles, their twelve names will be written on the New City - Jerusalem Walls (Rev 21:14). They are also referred to as "Apostles of the lamb"

Thirdly, the apostles who were given to the Church according to (Ephesians 4:11) "The modern day apostles"

The word Apostle, is derived from classical Greek word 'apostolos', meaning "one who is sent away, a messenger or ambassador".

Christian apostles are messengers sent forth by Jesus specifically to proclaim the Truth (gospel) of the kingdom of God. Example; Apostle Paul even though he was the among called "New Testament Apostles" was specifically called by Jesus to preach to the Gentiles (Gal 1:1, 15-17).