The Oriental civilizations on the contrary were sacerdotal in character. As in medieval Europe, the scholars of Asia and Egypt were priests. In the temples the nature of the gods and of man were not the only subjects of discussion; mathematics, astronomy, medicine, philology and history were also studied. The successors of Berosus, a priest from Babylonia, and {32} Manetho, a priest from Heliopolis, were considered deeply versed in all intellectual disciplines as late as the time of Strabo.[13] This state of affairs proved detrimental to the progress of science. Researches were conducted according to preconceived ideas and were perverted through strange prejudices. Astrology and magic were the monstrous fruit of a hybrid union. But all this certainly gave religion a power it had never possessed either in Greece or Rome. All results of observation, all conquests of thought, were used by an erudite clergy to attain the principal object of their activities, the solution of the problem of the destiny of man and matter, and of the relations of heaven and earth. An ever enlarging conception of the universe kept transforming the modes of belief. Faith presumed to enslave both physics and metaphysics. The credit of every discovery was given to the gods. Thoth in Egypt and Bel in Chaldea were the revealers not only of theology and the ritual, but of all human knowledge.[14] The names of the Oriental Hipparchi and Euclids who solved the first problems of astronomy and geometry were unknown; but a confused and grotesque literature made use of the name and authority of Hermes Trismegistus. The doctrines of the planetary spheres and the opposition of the four elements were made to support systems of anthropology and of morality; the theorems of astronomy were used to establish an alleged method of divination; formulas of incantation, supposed to subject divine powers to the magician, were combined with chemical experiments and medical prescriptions.