807. There are two modes in which spiritual manifestations are made through the influence or sub-agency of media. In the one mode, they employ the tongue to speak, the fingers to write, or hands to actuate tables or instruments for communication; in the other, they act upon ponderable matter directly, through a halo or aura appertaining to media; so that although the muscular power may be incapacitated for aiding them, they will cause a body to move, or produce raps intelligibly so as to select letters conveying their ideas, uninfluenced by those of the medium.
808. Even where they act through the muscular frame of the media, their vision may be intercepted by a screen, so that they cannot influence the selection of the letters requisite to a communication. ([Plate I].)
809. Rappings or tappings are made at the distance of many feet from the medium, and ponderable bodies, such as bells, are moved or made to undergo the motion requisite to being rang.
810. It will be perceived that my spirit father, in reply to the queries put in relation to this mystery, asks, “How do you move your limbs—carry the body wheresoever it goeth? how does God cause the movements of astronomical orbs?” ([457].)
811. Evidently some instrument must intervene between the divine will and the bodies actuated thereby, and in humble imitation between the human will and the limbs. Upon the viscera our will has no influence. The heart moves without the exercise of volition.
812. As there is an ethereal medium by means of which light moves through space from the remotest visible fixed star to the eye, at the rate of two hundred thousand miles per second; as through an affection of the same ether frictional electricity moves, according to Wheatstone’s estimate, with a velocity exceeding that of light,—so may we not infer that the instrument of Divine will acts with still greater velocity, and that in making man in this respect after his own image, so far as necessary to an available existence, gives him one degree of power over the same element while in the mortal state, and another higher degree of power in the spiritual state. But if there be an element through which a spirit within his mortal frame is capable of actuating that frame, may not this element of actuation be susceptible of becoming an instrument to the will of another spirit in the immortal state?
813. The aura of a medium which thus enables an immortal spirit to do within its scope things which it cannot do otherwise, appears to vary with the human being resorted to; so that only a few are so endowed with this aura as to be competent as media. Moreover, in those who are so constituted as to be competent instruments of spiritual actuation, this competency is various. There is a gradation of competency, by which the nature of the instrumentality varies from that which empowers violent loud knocking and the moving of ponderable bodies without actual contact, to the grade which confers power to make intellectual communications of the higher order without that of audible knocking. Further, the power to employ these grades of mediumship varies as the sphere of the spirit varies.
814. It has been stated that mortals have each a halo perceptible to spirits, by which they are enabled to determine the sphere to which any individual will go on passing death’s portal. Spirits cannot approach effectively a medium of a sphere much above, or below that to which they belong.
815. As media, in proportion as they are more capable of serving for the higher intellectual communication, are less capable of serving for mechanical demonstration, and as they are more capable of the latter are less competent for the former, spirits likewise have a higher or lower capacity to employ media. It has been mentioned that having made a test apparatus, my spirit sister alleged that it could not be actuated by her without assistance of spirits from a lower sphere. I inquired whether she could not meet me again, accompanied by the requisite aid. The reply was in the affirmative, and accordingly she met me at an appointed hour, and my apparatus was actuated effectually under test conditions. ([Plate 4], dd, ii, kk.)