The Insect" is one of the four remarkable works in which the late M. Michelet embodied the results of a loving and persevering study of Nature. These works are absolutely unique; the poetry of Science was never before illustrated on so large a scale, or with so much vividness of fancy, or in so eloquent a style. The aspects of Nature were never before examined with so strong an enthusiasm or so definite an individuality,—with so eager a desire to identify them with the feelings, hopes, and aspirations of humanity. Michelet approached his subject neither as philosopher nor as poet, but yet with something of the spirit of both. His philosophy and poetry, however, were both subordinate to his ardent sympathy with what he conceived to be the soul, the personality of Nature; and whether his attention was directed to the life of ocean, the bird, the insect, or the mountain-plant, he still sought for some evidence of its special and distinct existence, with thoughts and emotions, as it were, and a character of its own. It was almost as if he saw in Nature a likeness to, and a kinship with, humanity. No doubt, in expressing these views he was occasionally led into a certain extravagance, and his enthusiasm not infrequently outran or overmastered his judgment. He lacked the profound insight and sober reflection of Wordsworth, and accuracy of detail was often sacrificed for the sake of a brilliant generalization. But, after making due allowance for defects inseparable, perhaps, from a genius rather passionate and impulsive than analytic and self-composed, it must be admitted that the lover of Nature has cause to be grateful for the fine fancies, rich illustrations, and suggestive analogies crowded into the books we speak of. A recent writer, M. Monod, has pronounced upon them an animated eulogium: "Scientific men may discover in these books errors, inaccuracies, and exaggerations; but, in spite of all, they have shown that the physical sciences, though accused of withering the soul, and robbing Nature of poetry and life of enchantment, contain the elements of a profound and varied poetry, that never loses its charm, because it is not dependent on the caprices of taste and fashion, but has its source in the unchangeable reality of things. Many have said that science will drive out religion and poetry; Michelet finds in every branch of science the demonstration of a new faith, revealing to him a harmony till then unperceived, centred in the supreme unity of the Divine mind and of the Absolute Being."
His father was a master printer, not very prosperous, and Jules assisted him in the actual work of the press. A place was offered him in the imperial printing office, but his father was able to send him to the famous Collège or Lycée Charlemagne, where he distinguished himself. He passed the university examination in 1821, and was soon appointed to a professorship of history in the Collège Rollin.
Soon after this, in 1824, he married. This was one of the most favourable periods ever for scholars and men of letters in France, and Michelet had powerful patrons in Abel-François Villemain and Victor Cousin, among others. Although he was an ardent politician (having from his childhood embraced republicanism and a peculiar variety of romantic free-thought), he was above all a man of letters and an inquirer into the history of the past. His earliest works were school textbooks. Between 1825 and 1827 he produced diverse sketches, chronological tables, etc, of modern history. His précis of the subject, published in 1827, is a sound and careful book, far better than anything that had appeared before it, and written in a sober yet interesting style. In the same year he was appointed maître de conferences at the École normale supérieure. Four years later, in 1831, the Introduction à l'histoire universelle showed a very different style, exhibiting the idiosyncrasy and literary power of the writer to greater advantage, but also displaying, in the words of the Encyclopedia Britannica, Eleventh Edition, "the peculiar visionary qualities which made Michelet the most stimulating, but the most untrustworthy (not in facts, which he never consciously falsifies, but in suggestion) of all historians."
"L'insetto nasce per se stesso, si muove, va, viene, avanza, ritorna, si gira, se vuole cambia idea, direzione, a seconda dei bisogni, appetiti, capricci. è sufficiente a se stesso, prevede, provvede, si difende, fa fronte agli imprevisti.(...) Nasce avido, capace di assorbire. E proprio l'assorbimento è il servizio che la natura si aspetta da lui."