Note Book of an English Opium-Eater by De Quincey, Thomas, 1785-1859

The darkness flying with him, naturally we have the feeling that he _is_ the darkness, and that all darkness has some essential relation to Satan.

But now, having thus witnessed his terrific expulsion, naturally we ask what was the sequel. Four books, however, are interposed before we reach the answer to that question. This is the reason that we fail to remark the extraordinary oversight of Milton. Dislocated from its immediate plan in the succession of incidents, that sequel eludes our notice, which else and in its natural place would have shocked us beyond measure. The simple abstract of the whole story is, that Satan, being ejected, and sternly charged under Almighty menaces not to intrude upon the young Paradise of God, 'rides with darkness' for exactly one week, and, having digested his wrath rather than his fears on the octave of his solemn banishment, without demur, or doubt, or tremor, back he plunges into the very centre of Eden. On a Friday, suppose, he is expelled through the main entrance: on the Friday following he re-enters upon the forbidden premises through a clandestine entrance. The upshot is, that the heavenly police suffer, in the first place, the one sole enemy, who was or could be the object of their vigilance, to pass without inquest or suspicion; thus they _inaugurate_ their task; secondly, by the merest accident (no thanks to their fidelity) they detect him, and with awful adjurations sentence him to perpetual banishment; but, thirdly, on his immediate return, in utter contempt of their sentence, they ignore him altogether, and apparently act upon Dogberry's direction, that, upon meeting a thief, the police may suspect him to be no true man; and, with such manner of men, the less they meddle or make, the more it will be for their honesty.

FOOTNOTE.