As Jesus prepared to ascend to heaven He led His disciples up to the Mount of Olives. He had an important parting message for them and the Mount of Olives was a fitting location for his final words. When they were all assembled around him, surrounded by the familiar scenes that reminded them of his ministry, Jesus instructed them to remain in Jerusalem until they received the Promise of the Father. What was this special promise? It was the baptism of the Holy Spirit that would equip them for the work that was before them.
Caught up in the elation of seeing Jesus alive and still clinging to the hope of some sort of glorious revolution against the Romans they fervently inquired “Lord, will You at this time restore the kingdom to Israel?” Instead of giving them a definitive response on the topic Jesus merely said “it is not for you to know the times or seasons which the Father has put in His own authority.”
The kingdom would be restored to the Saints of the Most High. (see Daniel 7:13-14) Spiritual Israel would inherit the kingdom prepared for them from the foundation of the world but that event was nothing like what the disciples were imagining. Israel as a nation would not achieve political greatness over the Roman Empire during the disciples' lifetime. Or ever. Instead, the work of the disciples was to establish the spiritual kingdom of God in the hearts of men. An extension of the work that Jesus himself had begun in Palestine and which was to spread across the globe.