Spiritism is the new science which comes to reveal to mankind, with irrefutable proofs, the existence and nature of the spiritual world, as well as its relations with the corporeal world. It shows us this world, no longer as something supernatural, but, on the contrary, as one of the living forces constantly at work in nature, as the origin of a multitude of phenomena hitherto incomprehensible and therefore relegated to the realm of the fantastic and the marvellous. To these relations Christ alludes in different circumstances, and that is why many of the things He said are still unintelligible or have been falsely interpreted. Spiritism is the key with whose help everything is easily explained.

The law of the Old Testament is embodied in Moses; that of the New Testament is embodied in Christ. Spiritism is the third revelation of the law of God, but it is not personified in any individual, for it is the product of the teaching imparted, not by man, but by the Spirits, who are the voices of Heaven, in all parts of the earth, and through an innumerable multitude of intermediaries. Spiritism is, in a certain sense, a collective being, comprising all the beings of the spiritual world, each one of whom brings to men the tribute of his lights to make them acquainted with that world and the fate that awaits them in it.

Just as Christ said, "I come not to abolish the law, but to fulfil it", so Spiritism says, "I come not to abolish the Christian law, but to fulfil it". It teaches nothing contrary to what Christ taught, but develops, completes and explains, in terms clear to the whole world, what was only said in an allegorical form. Spiritism comes to fulfil, in the foretold times, what Christ announced, and to prepare for the fulfilment of future things. It is, therefore, the work of Christ, which He Himself presides over, just as He presides over what He also announced: the regeneration which is operative, and which prepares the kingdom of God on earth.