The curious may also consult, on all these things, The Philosophy of Mysticism, by Karl du Prel, translated by Mr.Massey.

The Assyrian Priest is in Proceedings, S.P.R., vol.xii., p.

14).
On the same plane as the dreams which we have been examining is the waking sensation of the deja vu.
"I have been here before, But when or how I cannot tell." Most of us know this feeling, all the circumstances in which we find ourselves have already occurred, we have a prophecy of what will happen next "on the tip of our tongues" (like a half-remembered name), and then the impression vanishes.

Scott complains of suffering through a whole dinner-party from this sensation, but he had written "copy" for fifty printed pages on that day, and his brain was breaking down.

Of course psychology has explanations.