This is the fairy-land of idealism where only the miraculous seems a matter of course and every hint of what is purely natural is disregarded, for the truly natural still seems artificial, dead, and remote. New and disconcerting facts, which intrude themselves inopportunely into the story, chill the currents of spontaneous imagination and are rejected as long as possible for being alien and perverse. Perceptions, on the contrary, which can be attached to the old presences as confirmations or corollaries, become at once parts of the warp and woof of what we call ourselves. They seem of the very substance of spirit, obeying a vital momentum and flowing from the inmost principle of being; and they are so much akin to human presumptions that they pass for manifestations of necessary truth. Thus the demonstrations of geometry being but the intent explication of a long-consolidated ideal concretion which we call space, are welcomed by the mind as in a sense familiar and as revelations of a truth implicit in the soul, so that Plato could plausibly take them for recollections of prenatal wisdom. But a rocket that bursts into sparks of a dozen colours, even if expected, is expected with anxiety and observed with surprise; it assaults the senses at an incalculable moment with a sensation individual and new. The exciting tension and lively stimulus may please in their way, yet the badge of the accidental and unmeaning adheres to the thing. It is a trivial experience and one quickly forgotten. The shock is superficial and were it repeated would soon fatigue. We should retire with relief into darkness and silence, to our permanent and rational thoughts. [Sidenote: Naturalism sad.]