Jesus said, ‘Blessed are the poor.’ Disciples of Jesus are armed in an odd fashion: we don’t take up weapons, but daily take up the cross.
Therefore, it makes sense that Christian hope is not for those who entertain high hopes in this world. Here’s a quotation that captures this powerfully:
The hope about which it [the Bible] speaks is valid for the hopeless and not for the optimists. It is valid for the poor and not for the rich. It is valid for the downtrodden and the insulted so that they will learn to walk uprightly, and all this as it will be in heaven, so already here on this earth. As the book of the promises of God, the Bible … points beyond itself into the future which does not yet fill our present.
(Jürgen Moltmann, quoted in New International Dictionary of New Testament Theology.)