Some writers maintain that they were also worshipers of the sun, and hence that their origin is to be traced to Persian sources. Even if so, they seemed to have escaped that confused and mystical philosophy which has robbed Oriental thought of much power in the realm of practical life. Philo says, "Of philosophy, the dialectical department, as being in no wise necessary for the acquisition of virtue, they abandon to the word-catchers; and the part which treats of the nature of things, as being beyond human nature, they leave to speculative air-gazers, with the exception of that part of it which deals with the subsistance of God and the genesis of all things; but the ethical they right well work out." Pliny the elder, who lived A.D. 23-79, made the following reference to the Essenes, which is especially interesting because of the tone of sadness and weariness with the world suggested in its praise of this Jewish sect. "On the western shore (of the Dead Sea) but distant from the sea far enough to escape from its noxious breezes, dwelt the Essenes. They are an eremite clan, one marvelous beyond all others in the whole world; without any women, with sexual intercourse entirely given up, without money, and the associates of palm trees. Daily is the throng of those that crowd about them renewed, men resorting to them in numbers, driven through weariness of existence, and the surges of ill-fortune, to their manner of life. Thus it is that through thousands of ages--incredible to relate!--their society, in which no one is born, lives on perennial. So fruitful to them is the irksomeness of life experienced by other men." Admission to the order was granted only to adults, yet children were sometimes adopted for training in the principles of the sect. Some believed in marriage as a means of perpetuating the order. Since it would not throw light on our present inquiry, the mooted question as to the connection of Essenism and the teachings of Jesus may be passed by. The differences are as great as the resemblances and the weight of opinion is against any vital relation. The character of this sect conclusively shows that some of the elements of Christian monasticism existed in the time of Jesus, not only in Palestine but in other countries. In an account of the Therapeutæ, or true devotees, an ascetic body similar to the Essenes, Philo says, "There are many parts of the world in which this class may be found.... They are, however, in greatest abundance in Egypt."