Thoreau had decided, it would seem, from the very first to lead a life of self-improvement: the needle did not tremble as with richer natures, but pointed steadily north; and as he saw duty and inclination in one, he turned all his strength in that direction. He was met upon the threshold by a common difficulty. In this world, in spite of its many agreeable features, even the most sensitive must undergo some drudgery to live. It is not possible to devote your time to study and meditation without what are quaintly but happily denominated private means; these absent, a man must contrive to earn his bread by some service to the public such as the public cares to pay him for; or, as Thoreau loved to put it, Apollo must serve Admetus. This was to Thoreau even a sourer necessity than it is to most; there was a love of freedom, a strain of the wild man, in his nature, that rebelled with violence against the yoke of custom; and he was so eager to cultivate himself and to be happy in his own society, that he could consent with difficulty even to the interruptions of friendship. "_Such are my engagements to myself_ that I dare not promise," he once wrote in answer to an invitation; and the italics are his own. Marcus Aurelius found time to study virtue, and between whiles to conduct the imperial affairs of Rome; but Thoreau is so busy improving himself that he must think twice about a morning call. And now imagine him condemned for eight hours a day to some uncongenial and unmeaning business! He shrank from the very look of the mechanical in life; all should, if possible, be sweetly spontaneous and swimmingly progressive. Thus he learned to make lead-pencils, and, when he had gained the best certificate, and his friends began to congratulate him on his establishment in life, calmly announced that he should never make another. "Why should I?" said he; "I would not do again what I have done once." For when a thing has once been done as well as it wants to be, it is of no further interest to the self-improver. Yet in after years, and when it became needful to support his family, he returned patiently to this mechanical art--a step more than worthy of himself.