Faith has to do with marrying Invisible and Visible. When we engage in an act of faith we give up control, we give up sensory (sight, hearing, etc.) confirmation of reality; we give up insisting on head-knowledge as our primary means of orientation in life. The positive way to say this is that when we engage in an act of faith we choose to deal with a living God whom we trust to know what he is doing… We choose to no longer operate strictly on the basis of hard-earned knowledge, glorious as it is, but over a lifetime to embrace the mystery that “must dazzle gradually/Or every man go blind…”
The introduction of the word “faith” into our language produces a radical and total reorientation from a flat-earth existence, plotted along the monotonous lines of a suburban subdivision, to a multidimensioned “on earth as it is in heaven,” in which God’s presence is the dominant and defining reality with whom we have to do.