59. Wise, incarnated spirits are powerful individualities, - indisputably so; but their action is restrained and necessarily slow in propagating itself. Allowing that one among them should come alone, - be it even Elias, Moses, Socrates, or Plato, - to reveal to us in these latter days the state of the spiritual world, which one among them would have proved the truth of his assertions in this time of skepticism? Would not men have regarded him as a dreamer or utopist? And, admitting that his teachings were accepted as the absolute truth, centuries would pass away before they would be accepted by the masses. God in his wisdom has not obtained it thus; he has willed that the instruction be given by the spirits themselves, and not by the incarnates, in order to convince men of their existence, and that it might take place simultaneously over all the Earth, which may have been to propagate it the more rapidly, or that we might find in the coincidence of the teaching a proof of its truth, each one having thus the means of convincing himself.