 One thing we can learn from all of Thoreau’s comments on scientific inquiry is that he cares very much about the following question: what can we know about the world, and how are we able to know it? Although he admires the precision of scientific information, he wonders if what it delivers is always bound to be “something less than the vague poetic” (Journal, 1/5/50). In principle, a naturalistic approach to reality should be able to capture its beauty and significance; in practice, however, it may be “impossible for the same person to see things from the poet’s point of view and that of the man of science” (Journal, 2/18/52). In that case, the best we can do is try to convey our intimations of the truth about the universe, even if this means venturing far beyond claims that are positivistically verifiable: “I desire to speak somewhere without bounds; like a man in his waking moment, to men in their waking moments; for I am convinced that I cannot exaggerate enough even to lay the foundation of a true expression… . The words which express our faith and piety are not definite; yet they are significant and fragrant like frankincense to superior natures” (Walden, XVIII). We should not arbitrarily limit our awareness to that which can be described with mathematical exactitude: perhaps the highest knowledge available to us, Thoreau suggests, consists in “a sudden revelation of the insufficiency of all that we called Knowledge before … it is the lighting up of the mist by the sun” (“Walking”). And perhaps this is not a regrettable fact: “At the same time that we are earnest to explore and learn all things, we require that all things be mysterious and unexplorable, that land and sea be infinitely wild, unsurveyed and unfathomed by us because unfathomable” (Walden, XVII). By acknowledging the limits of what we can know with certainty, we open ourselves up to a wider horizon of experience.