Delay, deferral

From Johnson's "Life of Pope," on Pope's Iliad translation:

When we find him translating fifty lines a day, it is natural to suppose that he would have brought his work to a more speedy conclusion. The Iliad, containing less than sixteen thousand verses, might have been despatched in less than three hundred and twenty days by fifty verses in a day. The notes, compiled with the assistance of his mercenaries, could not be supposed to require more time than the text. According to this calculation, the progress of Pope may seem to have been slow; but the distance is commonly very great between actual performances and speculative possibility. It is natural to suppose, that as much as has been done to-day may be done to-morrow; but on the morrow some difficulty emerges, or some external impediment obstructs. Indolence, interruption, business, and pleasure, all take their turns of retardation; and every long work is lengthened by a thousand causes that can, and ten thousand that cannot, be recounted. Perhaps no extensive and multifarious performance was ever effected within the term originally fixed in the undertaker's mind. He that runs against Time, has an antagonist not subject to casualties.