“ Ever since man has thought, since he has been able to express and write down his thoughts, he has felt himself close to a mystery which is impenetrable to his coarse and imperfect senses, and he endeavors to supplement the feeble penetration of his organs by the efforts of his intellect. ”
 Guy de Maupassant, The Horla (1887). copy citation

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“he declared, "on the point of discovering one of the most important secrets of nature, I mean to say, one of its most important secrets on this earth, for assuredly there are some up in the stars, yonder, of a different kind of importance. Ever since man has thought, since he has been able to express and write down his thoughts, he has felt himself close to a mystery which is impenetrable to his coarse and imperfect senses, and he endeavors to supplement the feeble penetration of his organs by the efforts of his intellect. As long as that intellect remained in its elementary stage, this intercourse with invisible spirits assumed forms which were commonplace though terrifying. Thence sprang the popular belief in the supernatural, the legends of wandering spirits, of fairies, of gnomes, of ghosts, I might even say the conception of God, for our ideas of the Workman-Creator, from whatever religion they may have come down to us, are certainly the most mediocre, the stupidest, and the most unacceptable inventions that ever sprang from the frightened brain of any human creature.” source