Nor are all words which are not found in the vocabulary, to be lamented as omissions. Of the laborious and mercantile part of the people, the diction is in a great measure casual and mutable; many of their terms are formed for some temporary or local convenience, and though current at certain times and places, are in others utterly unknown. This fugitive cant, which is always in a state of increase or decay, cannot be regarded as any part of the durable materials of a language, and therefore must be suffered to perish with other things unworthy of preservation. Care will sometimes betray to the appearance of negligence. He that is catching opportunities which seldom occur, will suffer those to pass by unregarded, which he expects hourly to return; he that is searching for rare and remote things, will neglect those that are obvious and familiar: thus many of the most common and cursory words have been inserted with little illustration, because in gathering the authorities, I forbore to copy those which I thought likely to occur whenever they were wanted. It is remarkable that, in reviewing my collection, I found the word sea unexemplified. Thus it happens, that in things difficult there is danger from ignorance, and in things easy from confidence; the mind, afraid of greatness, and disdainful of littleness, hastily withdraws herself from painful searches, and passes with scornful rapidity over tasks not adequate to her powers, sometimes too secure for caution, and again too anxious for vigorous effort; sometimes idle in a plain path, and sometimes distracted in labyrinths, and dissipated by different intentions. A large work is difficult because it is large, even though all its parts might singly be performed with facility; where there are many things to be done, each must be allowed its share of time and labour, in the proportion only which it bears to the whole; nor can it be expected, that the stones which form the dome of a temple, should be squared and polished like the diamond of a ring.