In one of his works Galen speaks of the passionate love and enthusiasm for truth which has possessed him since boyhood, so that he has not stopped either by day or by night from quest of it.[534] He realized that to become a true scholar required both high natural qualifications and a superior type of education from the start. After his fourteenth year he heard the lectures of various philosophers, Platonist and Peripatetic, Stoic and Epicurean; but when about seventeen, warned by a dream of his father,[535] he turned to the study of medicine. This incident of the dream shows that neither Galen nor his father, despite their education and intellectual standards, were free from the current belief in occult influences, of which we shall find many more instances in Galen’s works. Galen first studied medicine for four years under Satyrus in his native city of Pergamum, then under Pelops at Smyrna, later under Numisianus at Corinth and Alexandria.[536] This was about the time that the great mathematician and astronomer, Ptolemy, was completing his observations[537] in the neighborhood of Alexandria, but Galen does not mention him, despite his own belief that a first-rate physician should also know such subjects as geometry and astronomy, music and rhetoric.[538] Galen’s interest in philosophy continued, however, and he wrote many logical and philosophical treatises, most of which are lost.[539] His father died when he was twenty, and it was after this that he went to other cities to study. [Sidenote: First visit to Rome.] Galen returned to Pergamum to practice and was, when but twenty-nine, made the doctor for the gladiators by five successive pontiffs.[540] During his thirties came his first residence at Rome.[541] The article on Galen in Pauly-Wissowa states that he was driven away from Rome by the plague, and in _De libris propriis_ he does say that, “when the great plague broke out there, I hurriedly departed from the city for my native land.”[542] But in _De prognosticatione ad Epigenem_ his explanation is that he became disgusted with the malice of the envious physicians of the capital, and determined to return home as soon as the sedition there was over.[543] Meanwhile he stayed on and gained great fame by his cures but their jealousy and opposition multiplied, so that presently, when he learned that the sedition was over, he went back to Pergamum. [Sidenote: Relations with the emperors: later life.]