TWO:An apprentice must guard against the too common impression that the engine, cylinder, piston, valves, and so on, are the main parts of steam machinery, and that the boiler and furnace are only auxiliaries. The boiler is, in fact, the base of the whole, that part where the power is generated, the engine being merely an agent for transmitting power from the boiler to work that is performed. This proposition would, of course, be reached by any one in reasoning about the matter and following it to a conclusion, but the fact should be fixed in the mind at the beginning.The chief theological doctrines held in common by the two schools, were the immortality of the soul and the existence of daemons. These were supposed to form a class of spiritual beings, intermediate between gods and men, and sharing to some extent in the nature of both. According to Plutarch, though very long-lived, they are not immortal; and he quotes the famous story about the death of Pan in proof of his assertion;390 but, in this respect, his opinion is not shared by Maximus Tyrius391, who expressly declares them to be immortal; and, indeed, one hardly sees how the contrary could have been maintained consistently with Platonic principles; for, if the human soul never dies, much less can spirits of a higher rank be doomed to extinction. As a class, the daemons are morally imperfect beings, subject to human passions, and capable of wrong-doing. Like men also, they are divided into good and bad. The former kind perform providential and retributive offices on behalf of the higher252 gods, inspiring oracles, punishing crime, and succouring distress. Those who permit themselves to be influenced by improper motives in the discharge of their appointed functions, are degraded to the condition of human beings. The bad and morose sort are propitiated by a gloomy and self-tormenting worship.392 By means of the imperfect character thus ascribed to the daemons, a way was found for reconciling the purified theology of Platonism with the old Greek religion. To each of the higher deities there is attached, we are told, a daemon who bears his name and is frequently confounded with him. The immoral or unworthy actions narrated of the old gods were, in reality, the work of their inferior namesakes. This theory was adopted by the Fathers of the Church, with the difference, however, that they altogether suppressed the higher class of Platonic powers, and identified the daemons with the fallen angels of their own mythology. This is the reason why a word which was not originally used in a bad sense has come to be synonymous with devil.
