Followers of Christ see the world as it is - physically decaying and spiritually infected with sin. But followers of Christ do not need to be pessimistic, because they have hope. The look forward to the new heaven and new earth God has promised, and they wait for God's new order that will free the world of sin, sickness, and evil. In the meantime, they go with Christ into the world where they heal people's bodies and souls and fight the evil effects of sin in the world.
And I John saw the holy city, new Jerusalem, coming down from God out of heaven, prepared as a bride adorned for her husband.
And I heard a great voice out of heaven saying, Behold, the tabernacle of God is with men, and he will dwell with them, and they shall be his people, and God himself shall be with them, and be their God.
And God shall wipe away all tears from their eyes; and there shall be no more death, neither sorrow, nor crying, neither shall there be any more pain: for the former things are passed away.
And he that sat upon the throne said, Behold, I make all things new. And he said unto me, Write: for these words are true and faithful.
And he said unto me, It is done. I am Alpha and Omega, the beginning and the end. I will give unto him that is athirst of the fountain of the water of life freely.