Blackwood's Edinburgh Magazine, Volume 57, No. 353, March 1845

EDINBURGH: WILLIAM BLACKWOOD AND SONS, 45, GEORGE STREET; AND 22 PALL-MALL, LONDON To whom all Communications (post paid) must be addressed. SOLD BY ALL THE BOOKSELLERS IN THE UNITED KINGDOM. PRINTED BY BALLANTYNE AND HUGHES, EDINBURGH.

Among the powers in man which suffer by this too intense life of the social instincts, none suffers more than the power of dreaming. Let no man think this a trifle. The machinery for dreaming planted in the human brain was not planted for nothing. That faculty, in alliance with the mystery of darkness, is the one great tube through which man communicates with the shadowy. And the dreaming organ, in connexion with the heart, the eye, and the ear, compose the magnificent apparatus which forces the infinite into the chambers of a human brain, and throws dark reflections from eternities below all life upon the mirrors of the sleeping mind.
But if this faculty suffers from the decay of solitude, which is becoming a visionary idea in England, on the other hand, it is certain that some merely physical agencies can and do assist the faculty of dreaming almost preternaturally. Amongst these is intense exercise; to some extent at least, and for some persons: but beyond all others is opium, which indeed seems to possess a specific power in that direction; not merely for exalting the colours of dream-scenery, but for deepening its shadows; and, above all, for strengthening the sense of its fearful realities .
The Opium Confessions were written with some slight secondary purpose of exposing this specific power of opium upon the faculty of dreaming, but much more with the purpose of displaying the faculty itself; and the outline of the work travelled in this course. Supposing a reader acquainted with the true object of the Confessions as here stated, viz. the revelation of dreaming, to have put this question:—
But how came you to dream more splendidly than others?
The answer would have been:— Because ( præmissis præmittendis ) I took excessive quantities of opium.