I do not understand what happens.

Do you make use of what the Lady Yva called the Fourth Dimension, so that our bodies pass over the seas and through mountains, like the vibrations of our Wireless, of which I was speaking to you ?" "No, Humphrey.

That method is good and easy, but I do not use it because if I did we should be visible in the places which we visit, since there all the atoms that make a man would collect together again and be a man." "What, then, do you do ?" I asked, exasperated.
"Man, Humphrey, is not one; he is many.

Thus, amongst other things he has a Double, which can see and hear, as he can in the flesh, if it is separated from the flesh." "The old Egyptians believed that," I said.
"Did they?
Doubtless they inherited the knowledge from us, the Sons of Wisdom.

The cup of our learning was so full that, keep it secret as we would, from time to time some of it overflowed among the vulgar, and doubtless thus the light of our knowledge still burns feebly in the world." I reflected to myself that whatever might be their other characteristics, the Sons of Wisdom had lost that of modesty, but I only asked how he used his Double, supposing that it existed.
"Very easily," he answered.