The work which we offer to the public must not be confused with a collection of reveries and errors to which their authors have tried to give credence by announcing supernatural feats; which the credulous and the ignorant seized with avidity. We only quote the most respectable authorities and most dignified in faith. The principles which we present are based on the doctrines of the ancients and modern, who full of respect for the Divinity, were always the friends of mankind, endeavoured to recall them to virtue, by showing them vice in all its deformity. We have drawn from the most pure sources, having only in view the love of truth and the desire to enlighten those who desire to discover the secrets of Nature and the marvels which they unfold to those who never separate the darkness which surrounds them. It is only given to those who are favoured by The Great Being, to raise themselves above the terrestrial sphere, and to plan a bold flight in the etheric regions; it is for these privileged men that we write. To us no importance is given to the splenetic Voices which are raised against us. The silence and the smile of disdain will be the only answer with which We shall oppose them, and we shall follow with firm Sustained steps the route which indicates to us the luminous stars which fill the heavens, which cover our heads, and which light these thousands of worlds, which bless every day with our Sovereign Master of the Universe, which He has created, also ourselves, and whose Will maintains this admirable order, Which commands our admiration, our respect and our love.