After Jesus’ ascension, the disciples spent several days in the Upper Room waiting for the special gift of the Holy Spirit that would give power to their witness. They actively sought the Spirit through prayer as well as putting away all differences among them, seeking unity and reconciliation. As they came close together in Christ-like fellowship, the Spirit fell upon them with power, and three thousand were converted in one day (Acts 2:41). JTL24 14.1
Just before the coming of Jesus, the Spirit will again fall in even greater power on God’s people as they humble their hearts in true repentance, confess their unbelief, and seek unity. This “refreshing from the presence of the Lord” (Acts 3:19-21), will give power to their proclamation of the 3rd angel of Revelation 14. The gospel must first be preached throughout the whole world, and then Jesus can return. JTL24 14.2