In the Ascension of the Lord, the First Reading is from the Acts of the Apostles. Saint Luke describes the last forty days of the Risen Christ on earth, teaching and preparing the apostles for His departure. Jesus instructed the Apostles to remain in Jerusalem to receive the Holy Spirit, the source of power. Then Jesus was lifted up in the sky and was covered by a cloud covered: The disciples received the angelic message that the ascended Jesus would come back again in glory “in the same way as you have seen Him going into Heaven.” Jesus’ Ascension marks the end of his journey on earth and signals the beginning of a new era. It is through the Holy Spirit that God's Plan of Salvation will continue until the end of time. And the mission of the Church also begins under the guidance of the Holy Spirit.