External objects produce decided effects upon the brain. A man shut up between four walls soon loses the power to associate words and ideas together. How many prisoners in solitary confinement become idiots, if not mad, for want of exercise for the thinking faculty!
Jules VerneAh!" I cried, springing up. "But no! no! My uncle shall never know it. He would insist upon doing it too. He would want to know all about it. Ropes could not hold him, such a determined geologist as he is! He would start, he would, in spite of everything and everybody, and he would take me with him, and we should never get back. No, never! never!" My over-excitement was beyond all description.
Jules VerneIn lighthearted countries, people joked about this phenomenon, but such serious, practical countries as England, America, and Germany were deeply concerned.
Jules Verne