From Edgar Allen Poe's essay The Imp of the Perverse:

We have a task before us which must be speedily performed. We know that it will be ruinous to make delay. The most important crisis of our life calls, trumpet-tongued, for immediate energy and action. We glow, we are consumed with eagerness to commence the work, with the anticipation of whose glorious result our whole souls are on fire. It must, it shall be undertaken to-day, and yet we put it off until to-morrow; and why? There is no answer, except that we feel perverse, using the word with no comprehension of the principle. To-morrow arrives, and with it a more impatient anxiety to do our duty, but with this very increase of anxiety arrives, also, a nameless, a positively fearful, because unfathomable, craving for delay. This craving gathers strength as the moments fly. The last hour for action is at hand. We tremble with the violence of the conflict within us, -- of the definite with the indefinite -- of the substance with the shadow. But, if the contest has proceeded thus far, it is the shadow which prevails, -- we struggle in vain. The clock strikes, and is the knell of our welfare. At the same time, it is the chanticleer-note to the ghost that has so long over-awed us. It flies -- it disappears -- we are free. The old energy returns. We will labour now. Alas, it is too late.

We stand upon the brink of a precipice. We peer into the abyss -- we grow sick and dizzy. Our first impulse is to shrink from the danger. Unaccountably we remain. By slow degrees our sickness, and dizziness, and horror, become merged in a cloud of unnameable feeling. By gradations, still more imperceptible, this cloud assumes shape, as did the vapor from the bottle out of which arose the genius in the Arabian Nights. But out of this our cloud upon the precipice's edge, there grows into palpability, a shape, far more terrible than any genius, or any demon of a tale, and yet it is but a thought, although a fearful one, and one which chills the very marrow of our bones with the fierceness of the delight of its horror. It is merely the idea of what would be our sensations during the sweeping precipitancy of a fall from such a height. And this fall -- this rushing annihilation -- for the very reason that it involves that one most ghastly and loathsome of all the most ghastly and loathsome images of death and suffering which have ever presented themselves to our imagination - for this very cause do we now the most vividly desire it. And because our reason violently deters us from the brink, therefore, do we the more impetuously approach it. There is no passion in nature so demoniacally impatient, as that of him, who shuddering upon the edge of a precipice, thus meditates a plunge. To indulge for a moment, in any attempt at thought, is to be inevitably lost; for reflection but urges us to forbear, and therefore it is, I say, that we cannot. If there be no friendly arm to check us, or if we fail in a sudden effort to prostrate ourselves backward from the abyss, we plunge, and are destroyed.

Examine these and similar actions as we will, we shall find them resulting solely from the spirit of the Perverse. We perpetrate them merely because we feel that we should not. Beyond or behind this, there is no intelligible principle. And we might, indeed, deem this perverseness a direct instigation of the Arch-Fiend, were it not occasionally known to operate in furtherance of good.

The next time I am procrastinating, I am totally blaming it on the Arch-Fiend instigating my perversity. We'll see if the Boss-man buyeth it...

Incidentally, I found this associated with a blog called The New Shelton Wet/Dry which has been cracking me up all day. Check it out. (Some posts decidedly NSFW.)