Assuredly I do not content that the democratic nations of our time are destined to witness the extinction of the transcendent luminaries of man's intelligence, nor even that no new lights will ever start into existence. At the age at which the world has now arrived, and amongst so many cultivated nations, perpetually excited by the fever of productive industry, the bonds which connect the different parts of science together cannot fail to strike the observation; and the taste for practical science itself, if it be enlightened, ought to lead men not to neglect theory. In the midst of such numberless attempted applications of so many experiments, repeated every day, it is almost impossible that general laws should not frequently be brought to light; so that great discoveries would be frequent, though great inventors be rare. I believe, moreover, in the high calling of scientific minds. If the democratic principle does not, on the one hand, induce men to cultivate science for its own sake, on the other it enormously increases the number of those who do cultivate it. Nor is it credible that, from amongst so great a multitude no speculative genius should from time to time arise, inflamed by the love of truth alone. Such a one, we may be sure, would dive into the deepest mysteries of nature, whatever be the spirit of his country or his age. He requires no assistance in his course--enough that he be not checked in it. All that I mean to say is this:--permanent inequality of conditions leads men to confine themselves to the arrogant and sterile research of abstract truths; whilst the social condition and the institutions of democracy prepare them to seek the immediate and useful practical results of the sciences. This tendency is natural and inevitable: it is curious to be acquainted with it, and it may be necessary to point it out. If those who are called upon to guide the nations of our time clearly discerned from afar off these new tendencies, which will soon be irresistible, they would understand that, possessing education and freedom, men living in democratic ages cannot fail to improve the industrial part of science; and that henceforward all the efforts of the constituted authorities ought to be directed to support the highest branches of learning, and to foster the nobler passion for science itself. In the present age the human mind must be coerced into theoretical studies; it runs of its own accord to practical applications; and, instead of perpetually referring it to the minute examination of secondary effects, it is well to divert it from them sometimes, in order to raise it up to the contemplation of primary causes. Because the civilization of ancient Rome perished in consequence of the invasion of the barbarians, we are perhaps too apt to think that civilization cannot perish in any other manner. If the light by which we are guided is ever extinguished, it will dwindle by degrees, and expire of itself.