The lost apostleship of Judas Iscariot had to be restored. The eleven must again become the twelve. The lesson of Judas is that any believer can become a traitor.
21 “Therefore it is necessary that of the men who have accompanied us all the time that the Lord Jesus went in and out among us— 22 beginning with the baptism of John until the day that He was taken up from us—one of these must become a witness with us of His resurrection.” 23 So they put forward two men, Joseph called Barsabbas (who was also called Justus), and Matthias. 24 And they prayed and said, “You, Lord, who know the hearts of all men, show which one of these two You have chosen 25 to occupy this ministry and apostleship from which Judas turned aside to go to his own place.” 26 And they drew lots for them, and the lot fell to Matthias; and he was added to the eleven apostles. 
Even though it was prophesied in the distant past there would be a man who betrayed the coming Messiah, it was never written in stone that Judas must take the course he did. It was a choice, the result of his own will. There were signs all along that there was something wrong with him that needed attention. And then he betrays the Lord with a kiss? How can any man so blessed be such a jackass?
Most of us would consider being one of the apostles as the highest possible honor. Imagine being with the Lord every day, being taught by Him, and being a witness of His majesty. This was the greatest Man who ever lived living an extraordinary life willing to pay the highest price for those He loved. Walking with Him, regardless of the challenges and persecution, would have been an absolute trip.
But Judas was a thief. He ripped off the Lord. He stole money dedicated to ministry. He griped about perceived excess or waste, even though he ended up wasting his own life. There is no excuse for such behavior, not then and not ever. He was a liar, a pretender, and a manipulator. It appears that other apostles didn’t like or trust him. The Lord called him a devil (diabolos), being defined as one prone to slander, vicious gossip, fraudulent accusations, and bearing false witness. Judas characterized an entire group of people. Was this why the Lord chose him? To reveal to His followers what they would face and to thus be prepared? All the apostles were tempted but Judas was the weak link. He refused to discipline himself properly. He never allowed the circumcision of his heart. He chose to oppose.
There had to be twelve. One must be chosen to replace him. It had to be a man who followed the Lord from beginning to end and witnessed His resurrection. The original twelve apostles represented in part the twelve tribes of Israel. Judas had much in common with the progenitor of the tribe of Dan, who was the likely ringleader in betraying Joseph and sending him off to Egyptian bondage. At some point in history this tribe disappeared. There is no record of Dan in the Book of Revelation tribe list. This lets us know what becomes of traitors.
Matthias (gift of God) was chosen as an honorable replacement to resurrect a dead apostleship and restore fullness to the twelve. The thief would be replaced with a giver. It was the highest of honors for one who must have been a thoroughly humble man.
Matthias was an apostolic example of the new birth.
© 2020 by RJ Dawson. All Rights Reserved.
 Unless otherwise noted all Scriptures are taken from the New American Standard Bible, © 1960, 1963, 1968, 1971, 1972, 1973, 1975, 1977, 1995 by The Lockman Foundation. Used by permission.