In thoughts from the visions of the night, when deep sleep falls on men,…
Physical science has established the remarkable fact that there may be, and in all probability are, phenomena which cannot be perceived by our senses. There are sounds which a trained ear can distinguish, which altogether escape an ordinary ear. There are musical variations which are detected by the practised ear of a skilled composer which altogether escape an uncultured listener. Sound vibrations of more than 38,000 pulsations a second are inaudible by ordinary persons, but are heard and registered by persons sensitive to the highest notes. Moreover, there appears to be no reason for doubting that there may be sound vibrations all around us of such extreme rapidity that we cannot hear them. Pass from acoustics to optics. White light consists of a complete series of coloured rays which, when refracted through a triangular bar of glass, form a continuous spectrum, passing by imperceptible shades from dark red through yellow, green and blue, to very dark violet. Just the same colours are seen in the rainbow. Now, there are rays at each end of the spectrum which cannot be seen. At one end there are heat rays, and at the other end there are chemical (actinic) rays, which are unperceived by our senses, whose existence is attested by other delicate instruments. And physical science gives no reason to believe that we know the absolute limit of the spectrum at either end. The man, then, who says he will not believe anything but what he can see, or what comes within the observation of his senses, limits his belief very considerably, and ignores a great deal that exists in the universe.
(T. T. Waterman.)
Parallel VersesKJV: In thoughts from the visions of the night, when deep sleep falleth on men,