From John the apostle, found in, The Gospel of God’s Love, page 357.
“A medium can receive only such truths as their soul condition is susceptible to the forming of a rapport by the spirit. The possibility of rapport, and the kind thereof, lie at the foundation of mediumship, and determine and limit the power of the spirit to convey their thoughts, and the capacity of the medium to receive them. When the medium is in a certain condition of development, and as that condition harmonizes with the condition of the spirit, the spirit and medium can form a rapport. And it is impossible for the spirit to write those things which require a greater degree of development than the medium at the time possesses.
“This fact (and Law) also will explain why the same spirit may communicate through several mediums and yet the communications through one medium may contain a higher or lower character of truth than those transmitted through some other medium. This can result in those mortals who have heard or read these different writings, have been prone to believe that the same spirit was not making both communications. But this is not a just conclusion; for while the spirit was in the same contition, possessing the same knowledge, at the time of both writings, yet the mediums, because of their difference in development, were unable to receive the same character of message.
“You may search the whole history of spirit/mortal communication and of mediumship, and you will not find any messages of the character of those that have been transmitted through you, and for the reasons I have stated.
“Swedenborg was the last and nearer perfect instrument for receiving these higher truths; and yet, because of his want of soul development, and being bound, more or less, by his orthodox beliefs and his scientific knowledge, caused him to mix these truths with his ideas of “correspondence,” and similar conceptions, he could not be successfully used to transmit these truths which we have been communicating through you.
“From all this you will comprehend why so very few messages containing high spiritual truths come through mediums. The mediums are so developed that they can recieve only messages dealing with the material affairs of life – and which kind of messages, I can truthfully say, are those that are largely desired by mortals seeking information from the spirit world.” (For more, see The Gospel of God’s Love, The Padgett Messages.)