“In a lovely book called On Hope, Josef Pieper explores Thomas Aquinas' theology of hope along these lines: the hopeful person is by definition a wayfarer (viator), because the virtue of hope lies midway between the two vices of despair (desperatio) and presumption (praesumptio). What despairing persons and presumptuous persons have in common is that they aren't going anywhere, they are fixed in place: the despairing because they don't think there's anywhere to go, the presumptuous because they think they have reached the pinnacle of achievement.”