The Abbé de Lamennais taught in the seminaries, but his teaching was looked upon with suspicion; and young people were forbidden the reading of a work, which the outside world regarded as that of a misguided god who wanted to deny man the right of freedom of thought. No suicide was ever more heroic, never did intellect bring so much courage and logic to the task of self-destruction. But, in reality, and from his point of view, the Abbé de Lamennais was right: if you believe in an infallible Church you must bravely destroy the eyes of your intellect and extinguish the light of your soul, and, having voluntarily made yourself blind, let yourself be led by the hand. But, however high a solitary intellect may be placed, it is very quickly reached by the influence of the times in which it lives. Two or three years ago, an aeronautic friend of mine, Petin, seriously propounded to me _viva voce_, and to the world through the medium of the daily papers, that he had just solved the great problem of serial navigation. He reasoned thus-- "The earth turns_--E pur si muove!_--and in the motion of rotation on its own axis, it successively presents every part of its surface, both inhabited and uninhabited. Now, any person, who could raise himself up into the extreme strata of ambient air, and could find a means to keep himself there, would be able to descend in a balloon and alight upon whatever town on the globe he liked; he would only have to wait until that town passed beneath his feet; in that way he could go to the Antipodes in a dozen hours, and without any fatigue whatsoever, since he would not stir from his position, as it would be the earth which would move for him."