By dint of close adherence to mere applications, principles would be lost sight of; and when the principles were wholly forgotten, the methods derived from them would be ill-pursued. New methods could no longer be invented, and men would continue to apply, without intelligence, and without art, scientific processes no longer understood. When Europeans first arrived in China, three hundred years ago, they found that almost all the arts had reached a certain degree of perfection there; and they were surprised that a people which had attained this point should not have gone beyond it. At a later period they discovered some traces of the higher branches of science which were lost. The nation was absorbed in productive industry: the greater part of its scientific processes had been preserved, but science itself no longer existed there. This served to explain the strangely motionless state in which they found the minds of this people. The Chinese, in following the track of their forefathers, had forgotten the reasons by which the latter had been guided. They still used the formula, without asking for its meaning: they retained the instrument, but they no longer possessed the art of altering or renewing it. The Chinese, then, had lost the power of change; for them to improve was impossible. They were compelled, at all times and in all points, to imitate their predecessors, lest they should stray into utter darkness, by deviating for an instant from the path already laid down for them. The source of human knowledge was all but dry; and though the stream still ran on, it could neither swell its waters nor alter its channel. Notwithstanding this, China had subsisted peaceably for centuries. The invaders who had conquered the country assumed the manners of the inhabitants, and order prevailed there. A sort of physical prosperity was everywhere discernible: revolutions were rare, and war was, so to speak, unknown. It is then a fallacy to flatter ourselves with the reflection that the barbarians are still far from us; for if there be some nations which allow civilization to be torn from their grasp, there are others who trample it themselves under their feet. Chapter XI: Of The Spirit In Which The Americans Cultivate The Arts