The central message of this sermon is that hope must be redefined as a supernatural trust in God's intervention, rather than a human expectation for earthly success or happiness. The speaker argues that when God acts to bring hope, it often disrupts our plans and circumstances, requiring us to adapt and change our expectations. Hope is not something we can manufacture on our own, but must be revealed through divine revelation, such as the angel's message to Joseph. This hope then motivates us to action, empowering us to live out God's salvation in our lives. The speaker emphasizes that true hope is found only in God's word and promises, and that it can sustain us even in difficult circumstances, moving us to act with confidence and courage. Ultimately, the sermon encourages listeners to shift their focus from human efforts to find meaning and purpose in life to trusting in God's sovereign plan and provision.