That eager desire to press forward, not so much to conquer obstacles as to elude them; that gambling with the solemn destinies of life, seeking ever to set success upon the chance of a die; that hastening from the wish conceived to the end accomplished; that thirst after quick returns to ingenious toil, and breathless spurrings along short cuts to the goal, which we see everywhere around us, from the Mechanics' Institute to the Stock Market,--beginning in education with the primers of infancy, deluging us with "Philosophies for the Million" and "Sciences made Easy;" characterizing the books of our writers, the speeches of our statesmen, no less than the dealings of our speculators,--seem, I confess, to me to constitute a very diseased and very general symptom of the times.

I hold that the greatest friend to man is labour; that knowledge without toil, if possible, were worthless; that toil in pursuit of knowledge is the best knowledge we can attain; that the continuous effort for fame is nobler than fame itself; that it is not wealth suddenly acquired which is deserving of homage, but the virtues which a man exercises in the slow pursuit of wealth,--the abilities so called forth, the self-denials so imposed; in a word, that Labour and Patience are the true schoolmasters on earth.

While occupied with these ideas and this belief, whether right or wrong, and slowly convinced that it was only in that species of composition with which I was most familiar that I could work out some portion of the plan that I began to contemplate, I became acquainted with the histories of two criminals existing in our own age,--so remarkable, whether from the extent and darkness of the guilt committed, whether from the glittering accomplishments and lively temper of the one, the profound knowledge and intellectual capacities of the other, that the examination and analysis of characters so perverted became a study full of intense, if gloomy, interest.
In these persons there appear to have been as few redeemable points as can be found in Human Nature, so far as such points may be traced in the kindly instincts and generous passions which do sometimes accompany the perpetration of great crimes, and, without excusing the individual, vindicate the species.

Yet, on the other hand, their sanguinary wickedness was not the dull ferocity of brutes; it was accompanied with instruction and culture,--nay, it seemed to me, on studying their lives and pondering over their own letters, that through their cultivation itself we could arrive at the secret of the ruthless and atrocious pre-eminence in evil these Children of Night had attained; that here the monster vanished into the mortal, and the phenomena that seemed aberrations from Nature were explained.
I could not resist the temptation of reducing to a tale the materials which had so engrossed my interest and tasked my inquiries.

And in this attempt, various incidental opportunities have occurred, if not of completely carrying out, still of incidentally illustrating, my earlier design,--of showing the influence of Mammon upon our most secret selves, of reproving the impatience which is engendered by a civilization that, with much of the good, brings all the evils of competition, and of tracing throughout, all the influences of early household life upon our subsequent conduct and career.