Are you sure of it?" asked Frederick. "Don't you think it is strange that alongside the greatest achievements of science, alongside Galileo, Kepler, Laplace; alongside the spectrum analysis and the law of the conservation of energy; alongside Kirchoff and Bunsen; alongside steam, gas, electricity, the blindest and most antiquated superstitions still survive, powerful as ever? I am not so certain that backsliding into the most horrible times of the Malleus maleficarum is impossible."