Meanwhile this laborious advocate and indefatigable courtier, whose labors at the bar and in attendance upon his great friends were enough to fill the days of two ordinary men, led his real life in secret, unknown to the world, and uncomprehended even by the few in whom he had divined a capacity for great thought, and whom he had selected for his confidants. From his childhood at the university, where he felt the emptiness of the Aristotelian logic, the instrument for attaining truth which traditional learning had consecrated, he had gradually formed the conception of a more fruitful process. He had become convinced that the learning of all past ages was but a poor result of the intellectual capacities and labors which had been employed upon it; that the human mind had never yet been properly used; that the methods hitherto adopted in research were but treadmill work, returning upon itself, or at best could produce but fragmentary and accidental additions to the sum of knowledge. All nature is crammed with truth, he believed, which it concerns man to discover; the intellect of man is constructed for its discovery, and needs but to be purged of errors of every kind, and directed in the most efficient employment of its faculties, to make sure that all the secrets of nature will be revealed, and its powers made tributary to the health, comfort, enjoyment, and progressive improvement of mankind. This stupendous conception, of a revolution which should transform the world, seems to have taken definite form in Bacon's mind as early as his twenty-fifth year, when he embodied the outline of it in a Latin treatise; which he destroyed in later life, unpublished, as immature, and partly no doubt because he came to recognize in it an unbecoming arrogance of tone, for its title was 'Temporis Partus Maximus' (The Greatest Birth of Time.) But six years later he defines these "vast contemplative ends" in his famous letter to Burghley, asking for preferment which will enable him to prosecute his grand scheme and to employ other minds in aid of it. "For I have taken all knowledge to be my province," he says, "and if I could purge it of two sorts of rovers, whereof the one with frivolous disputations, confutations, and verbosities, the other with blind experiments and auricular traditions and impostures, hath committed so many spoils, I hope I should bring in industrious observations, grounded conclusions, and profitable inventions and discoveries: the best state of that province. This, whether it be curiosity or vain glory, or nature, or (if one take it favorably) _philanthropia_ is so fixed in my mind as it cannot be removed."