The disciples returned to the Upper Room in Jerusalem. Here, Part 1 of the Acts emphasizes the first administrative act of the fledgling Church: the restoration of the Twelve. Through prayer and the casting of lots, Matthias was chosen to take the place of the fallen Judas, proving that the apostolic office is a divine stewardship that must endure until the end of the age. The Descent of the Comforter (Pentecost)
When the day of Pentecost had fully come, the promise of the Father arrived with the sound of a rushing mighty wind. This was the reversal of Babel. Where once tongues were confused to scatter the proud, tongues of fire now descended to unite the humble.
Here is a long-form reflection and narrative overview of the first part of the Acts, styled in the tradition of the Synaxarion. The Synaxarion of the Holy Apostles: Part I The Prologue: The Forty Days