The central message of this sermon is that faith is not just about trusting in God for salvation, but also about living out that trust in everyday life. The speaker emphasizes that biblical faith involves basing one's actions and decisions on the unseen realities of God's promises, rather than solely on tangible, measurable things. This kind of faith was demonstrated by the patriarchs, Abraham, Isaac, Jacob, and Joseph, who lived their lives with a deep understanding that they were strangers and aliens in this world, longing for a better country - a heavenly one. The speaker argues that this living faith transforms one's perspective on life, making them aware that they are not truly at home in this world, but are instead pilgrims journeying towards their true home. This message advances the belief that faith is not just a feeling or an intellectual assent to certain propositions, but a living, active trust that shapes one's entire way of being in the world. The takeaway for listeners is that they too can live out this kind of faith, trusting in God's promises and living with a deep sense of hope and longing for the heavenly realm.