Let the student be at rest in one of his prescribed positions, having bathed and robed with the proper decorum. Let the place of working be free from all disturbance, and let the preliminary purifications, banishings and invocations be duly accomplished, and, lastly, let the incense be kindled.
Let him imagine his own figure (preferably robed in the proper magical garments and armed with the proper magical weapons) as enveloping his physical body, or standing near to and in front of him.
Let him then transfer the seat of his consciousness to that imagined figure; so that it may seem to him that he is seeing with its eyes, and hearing with its ears.
This will usually be the great difficulty of the operation.
Let him then cause that imagined figure to rise in the air to a great height above the earth.
Let him then stop and look about him. (It is sometimes difficult to open the eyes.)
Probably he will see figures approaching him, or become conscious of a landscape.
Let him speak to such figures, and insist upon being answered, using the proper pentagrams and signs, as previously taught.
Let him travel about at will, either with or without guidance from such figure or figures.
Let him further employ such special invocations as will cause to appear the particular places he may wish to visit.
Let him beware of the thousand subtle attacks and deceptions that he will experience, carefully testing the truth of all with whom he speaks.
Thus a hostile being may appear clothed with glory; the appropriate pentagram will in such a case cause him to shrivel or decay.
Practice will make the student infinitely wary in these matters.
It is usually quite easy to return to the body, but should any difficulty arise, practice (again) will make the imagination fertile. For example, one may create in thought a chariot of fire with white horses, and command the charioteer to drive earthwards.
It might be dangerous to go too far, or to stay too long; for fatigue must be avoided.
The danger spoken of is that of fainting, or of obsession, or of loss of memory or other mental faculty.
Finally, let the student cause his imagined body in which he supposes himself to have been travelling to coincide with the physical, tightening his muscles, drawing in his breath, and putting his forefinger to his lips. Then let him "awake" by a well-defined act of will, and soberly and accurately record his experiences.
It may be added that this apparently complicated experiment is perfectly easy to perform. It is best to learn by "travelling" with a person already experienced in the matter. Two or three experiments will suffice to render the student confident and even expert. See also "The Seer", pp. 295-333.