other similar experiences I have had, I have been fully aware of seeing
the places in question. The evidence tells both ways, and I can
therefore only infer that there are two modes of psychic action, in one
of which the person projecting that action, whether voluntarily or
involuntarily, experiences corresponding sensations, and the other in
which he does not; but I am unable to offer any criterion by which the
observer can, with certainty, distinguish between the two.

It appears to me, that such instances as those I have mentioned, point
to ranges of etheric action beyond those ordinarily recognized by
physical science, but the principle seems to be the same, and it is for
this reason that I have taken the modern scientific theory of etheric
vibration as our starting-point. The universe is one great whole, and
the laws of one part cannot contradict those of another; therefore the
explanation of such queer happenings is not to be found by denying the
well-ascertained laws of Nature on the physical plane, but by
considering whether these laws do not extend further. It is on this
account that I would lay stress on the Mathematical side of things, and
have adduced instances where various discoveries have been made by
following up the sequence indicated by the laws already known, and which
have thus enabled us to fill up gaps in our knowledge, which would
otherwise stop, or at least seriously hinder, our further progress. It
is in this way that Jachin helps Boaz, and that the undeviating nature
of Law, so far from limiting us, becomes our faithful ally if we will
only allow it to do so.

I think, then, that the scientific idea of the ether, as a universal
medium pervading all space, and permeating all substance, will help us
to see that many things which are popularly called supernatural, are to
be attributed to the action of known laws working under, as yet, unknown