SCIENCE.

The human intellect holds in its powerful grasp the infinite universe of space and time; it has penetrated the inaccessible domain of the Past, sounded the mystery of the unfathomable heavens, and believes that it has explained the riddle of the universe. The objective world has unrolled before the eyes of science its splendid panorama and its magnificent wealth of forms. The studies of man have led him to a knowledge of truth; he has explored the universe, discovered the inexorable reign of law, and the application of the forces that sustain all things. If it has not been permitted to him to see the First Cause face to face, at least he has attained a true mathematical idea of the series of secondary causes.

In this latest century, above all, the experimental a priori method, the only really scientific one, has been put into practice in the natural sciences, and by its aid man has freed himself from the prejudices of the old school of thought, one by one, and from subjective or speculative theories, and confined himself to a careful and intelligent study of the field of observation.

Yes, human science is firmly based and pregnant with possibility, worthy of our homage for its difficult and long-proved past, worthy of our sympathy for its future, big with the promise of useful and profitable discoveries. For nature is henceforth to be a book accessible to the bibliographical researches of the studious, a world open to the investigations of the thinker, a fertile region which the human mind has already visited, and in which we must needs advance boldly, holding in our hand experience as our compass....

An old friend of my terrestrial life recently spoke to me as follows. One of our wanderings had brought us back to the Earth, and we were making a new moral study of this world. My companion remarked that man is to-day familiar with the most abstract laws of mechanics, physics, chemistry, ... that the applications of knowledge to industry are not less remarkable than the deductions of pure science, and that it seems as if the entire universe, wisely studied by man, was to be his royal appanage. As we pursued our journey beyond the bounds of this world, I answered him in the following terms:

"A feeble atom, lost to sight in an imperceptible point of the infinite, man has believed he could embrace in the sweep of his vision the whole expanse of the universe, whereas he can scarcely pass beyond the region he inhabits; he has thought he could study the laws of all nature, and his investigations have scarcely reached the forces in action about him; he has thought he could determine the grandeur of the starry heaven, and he exhausted his powers in the study of a grain of dust. The field of his researches is so small that, once lost to view, the mind seeks in vain to recover it; the human heaven and earth are so small that scarcely has the soul in its flight had time to spread its wings before it has reached the last regions accessible to the observation of man; for the immeasurable Universe surrounds us on all sides, unfolding beyond the limits of our heavens its unknown riches, putting its inconceivable forces into play, and reaching forward into immensity in the splendor of its life.

"And the mere flesh-worm, the miserable mite, blind and wingless, whose wretched existence is passed upon the leaf where it was born, would presume (because forsooth it has taken a few steps upon this leaf shaken in the wind) to have the right to speak of the immense tree to which it belongs, of the forest of which this tree forms a part, and to sagely descant upon the nature of the vegetation developed thereon, of the beings that inhabit it, of the distant sun whose rays bring to it movement and life? In very truth, man is strangely presumptuous to desire to measure infinite greatness by the foot-rule of his infinite littleness.

"Therefore be this truth well impressed on his mind,—if the arid labors of past ages have acquired for him an elementary knowledge of things, if the progress of thought has placed him at the vestibule of knowledge, still he has not yet spelled out more than the first page of the Book, and, like a child, liable to be deceived by every word, far from claiming the right to authoritatively interpret the work, he ought to content himself with humbly studying it, page by page, line by line. Happy, however, those who are able to do this!"

Galileo.

These were my customary thoughts. They are the thoughts of a student of nineteen or twenty who has acquired the habit of thinking. There can be no doubt that they were wholly the product of my own intellect, and that the illustrious Florentine astronomer had nothing whatever to do with them. Besides, this would have been a collaboration to the last degree improbable.