24. Since the visible world lives in the midst of the invisible world and is in constant contact with it, it follows that these two react incessantly upon each other; that, since there are human beings, there are spirits too, and that if the latter have the ability to manifest themselves, then they must have done so in all ages and amongst all cultures. However, as of late, spirit manifestations have increased substantially, and have taken on a greater character of authenticity. It was in the designs of Providence to put an end to the scourge of disbelief and materialism by means of obvious proofs, enabling those who have left the earth behind to come and attest to their existence, and to reveal their happy or unhappy condition to us.
