De Arcano Per Quod Spiritus Quidam In Corpore Recipiatur
Here now is another Formula of Power, good to invoke any Being to manifest in thyself. First, invoke him by the Power of all thy Spells and conjurations, with Mind concentrated and Will vehement, toward him, as I have written in many Books. But because thou are nemo, thou mayst safely invoke him, no matter of what Nature, within thy Circle. Now then do thou confer on him as a Guerdon of his Obedience the Dignity of a Soul seeking Incarnation, and so precede to consecrate thine Act by performing the Mass of the Holy Ghost. Then shall that Spirit make himself Body from those Elements, and thou partaking thereof makest thine own Body his Machinery of Manifestation, and thus mayst thou work with any Spirit soever; yet this shall serve thee most in common Life. Also the Qualities are well defined in the Cards of the Tarot, so that thou hast a clear-cut Means of developing thy Powers according to the Needs of the Time. But learn also this, to work constantly under the Guidance of thine Holy Guardian Angel, so that thy Workings be alway in Harmony and Accord with thy true Will.
 On the Secret through which any Spirit is Received in the Body