Allan Kardec-THE Spirit's Book_ The Principles of Spiritist Doctrine (1989)

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ALLAN KARDEC
"You do not teach to children what you teach to adults, and you do not give to a new-born
babe the food which he could not digest; there is a time for all things. Spirits have taught
many things that men have not understood or have perverted, but that they are now capable of
understanding aright. Through their teaching in the past, however incomplete, they have
prepared the ground to receive the seed which is now about to fructify."
802. Since Spiritism is to mark a progress on the part of tile human race, why do not spirits
hasten this progress by manifestations so general and so patent as to carry conviction to the
most incredulous?
"You are always wanting miracles; but God sows miracles by handfuls under your feet, and
yet you still have men who deny their existence. Did Christ Himself convince His
contemporaries by the prodigies He accomplished? Do you not see men, at this day, denying
the most evident of facts, though occurring under their very eyes? Have you not among you
some who say that they would not believe, even though they saw? No; it is not by prodigies
that God wills to bring men back to the truth; He wills, in His goodness, to leave to them the
merit of convincing themselves through the exercise of their reason."