When Jesus taught and ministered on earth, He did not simply tell people about a sweet by-and-by, where we could go when we die. That is not the hope of Christianity. That is not the message of Jesus.
Sure, life after death and eternal happiness with God in heaven is part of the gospel message, but it is not the only part—or even the main part.
The central message of Jesus was that in Him, heaven and earth were now being joined together. He was the nexus between God and man. In Him, heaven and earth were being rejoined and remade into one new creation of God. His message and His miracles indicated that this new creation had begun, but when Jesus left this earth and ascended back into heaven, He left to the church the task of finishing what He inaugurated.
It is the church’s task to take the Kingdom of Heaven and bear it with boldness and bravery into the meanest places on planet earth, to bring light to the darkness, healing to the sick, hope to the hopeless, and freedom to the captives.