A few years ago, or even at the present time, many school-books in use which treat of mechanics in connection with natural philosophy are so arranged as to hinder a learner from grasping a true conception of force, power, and motion; these elements were confounded with various agents of transmission, such as wheels, wedges, levers, screws, and so on. A learner was taught to call these things "mechanical powers," whatever that may mean, and to compute their power as mechanical elements. In this manner was fixed in the mind, as many can bear witness, an erroneous conception of the relations between power and the means for its transmission; the two things were confounded together, so that years, and often a lifetime, has not served to get rid of the idea of power and mechanism being the same. To such teaching can be traced nearly all the crude ideas of mechanics so often met with among those well informed in other matters. In the great change from empirical rules to proved constants, from special and experimental knowledge to the application of science [4] in the mechanic arts, we may, however, go too far. The incentives to substitute general for special knowledge are so many, that it may lead us to forget or underrate that part which cannot come within general rules.Closely connected with the materialism of the Stoics, and equally adverse to the principles of Plato and Aristotle, was their fatalism. In opposition to this, Plotinus proceeds to develop the spiritualistic doctrine of free-will.438 In the previous discussion, we had to notice how closely his arguments resemble those employed by more modern controversialists. We have here to point out no less wide a difference between the two. Instead of presenting free-will as a fact of consciousness which is itself irreconcilable with the dependence of mental on material changes, our philosopher, conversely, infers that the soul must be free both from the conditions of mechanical causation and from the general interdependence of natural forces, because it is an individual substance.439 In truth, the phenomena of volition were handled by the ancient philosophers with a vagueness and a feebleness offering the most singular contrast to their powerful and discriminating grasp of other psychological problems. Of necessarianism, in the modern sense, they had no idea. Aristotle failed to see that, quite apart from external restraints, our choice may conceivably be determined with the utmost rigour by an internal motive; nor could he understand that the circumstances which make a man responsible for his actions do not amount to a release of his conduct from the law of universal causation. In this respect, Plato saw somewhat deeper than his disciple, but created298 fresh confusion by identifying freedom with the supremacy of reason over irrational desire.440 Plotinus generally adopts the Platonist point of view. According to this, the soul is free when she is extricated from the bonds of matter, and determined solely by the conditions of her spiritual existence. Thus virtue is not so much free as identical with freedom; while, contrariwise, vice means enslavement to the affections of the body, and therefore comes under the domain of material causation.441 Yet, again, in criticising the fatalistic theories which represent human actions as entirely predetermined by divine providence, he protests against the ascription of so much that is evil to so good a source, and insists that at least the bad actions of men are due to their own free choice.442
In making notes, as much as possible of what is written should be condensed into brief formul?, a form of expression which is fast becoming the written language of machine shops. Reading formul? is in a great degree a matter of habit, like studying mechanical drawings; that which at the beginning is a maze of complexity, after a time becomes intelligible and clear at a glance.It is, perhaps, characteristic of the times that Aelians stories should redound more especially to the credit of Asclpius and Heracles, who were not gods of the first order, but demi-gods or deified mortals. Their worship, like that of the Nature-powers connected with earth rather than with heaven, belongs particularly to the popular religion, and seems to have been repressed or restrained in societies organised on aristocratic principles. And as more immediate products of the forces by which supernaturalist beliefs are created and maintained, such divinities would profit by the free scope now given to popular predilections. In their case also, as with the earth-goddesses Dmtr and Isis, a more immediate and affectionate relation might be established between the believer and the object of his worship than had been possible in reference to the chief Olympian gods. Heracles had lived the life of a man, his activity had been almost uniformly beneficent, and so he was universally invoked, as a helper and healer, in the sick-chamber no less231 than on the storm-tost ship.354 Asclpius was still more obviously the natural refuge of those who were afflicted with any bodily disease, and, in a time of profound peace, this was of all calamities the most likely to turn mens thoughts towards a supernatural protector. Hence we find that where, apart from Christianity, the religious enthusiasm of the second century reaches its intensest expression, which is in the writings of the celebrated rhetor Aristeides, Asclpius comes in for the largest share of devotional feeling. During an illness which continued through thirteen years, Aristeides sought day and night for help and inspiration from the god. It came at last in the usual form of a prescription communicated through a dream. Both on this and on other occasions, the excitement of an overwrought imagination combined with an exorbitant vanity made the sophist believe himself to be preferred above all other men as an object of the divine favour. At one time he would see himself admitted in his dreams to an exchange of compliments with Asclpius; at other times he would convert the most ordinary incidents into signs of supernatural protection. Thus his foster-sister having died on the day of his own recovery from a dangerous epidemic, it was revealed to him in a dream that her life had been accepted as a ransom for his. We are told that the monks of the Middle Ages could not refrain from expressing their indignant contempt for the insane credulity of Aristeides, in marginal notes on his orations; but the last-mentioned incident, at least, is closely paralleled by the well-known story that a devout lady was once permitted to redeem the life of Pius IX. by the sacrifice of her own.355The doctrine, in its very earliest form, had left a large neutral ground between good and evil, comprehending almost all the common objects of desire and avoidance. These the Stoics now proceeded to divide according to a similar principle of arrangement. Whatever, without being morally good in the strictest sense, was either conducive to morality, or conformable to human nature, or both, they called preferable. Under this head came personal advantages, such as mental accomplishments, beauty, health, strength, and life itself; together with external advantages, such as wealth, honour, and high connexions. The opposite to preferable things they called objectionable; and what lay between the two, such as27 the particular coin selected to make a payment with, absolutely indifferent.584. The cost of construction and durability.It was a little before five when the trio reached the Metropole. A suite of rooms had been chartered by the Hungarian capitalist, and there he had already established a secretary and a clerk or two to look after his affairs. He was seated in his shirtsleeves, with a big black cigar in his mouth, when his visitors entered. He extended two fingers to Isidore, to the others he merely bowed.
