Seleucus, while still living, appointed his son, Antiochus,
king of upper Asia in place of himself. If this seems noble and kingly on his part, even nobler and wiser was his behavior in reference to his son's falling in love, and his self-restraint in suffering; for Antiochus was in love with Stratonice, the wife of Seleucus, his own stepmother, who had already borne a child to Seleucus. Recognizing the wickedness of this passion, Antiochus did nothing wrong, nor did he show his feelings, but he fell sick, took to his bed, and longed for death. Nor could the celebrated physician, Erasistratus, who was serving Seleucus at a very high salary, form any diagnosis of his malady. At length, observing that his body was free from all the symptoms of disease, he conjectured that this was some condition of the mind, through which the body is often strengthened or weakened by sympathy. Grief, anger, and other passions disclose themselves; love only is concealed by the modest. As Antiochus would confess nothing when the physician asked him in confidence, he took a seat by his side and watched the changes of his body to see how he was affected by each person who entered his room. He found that when others came the patient was all the time weakening and wasting away at a uniform pace, but when Stratonice came to visit him his mind was greatly agitated by the struggles of modesty and conscience, and he remained silent. But his body in spite of himself became more vigorous and lively, and when she went away he became weaker again. So the physician told Seleucus that his son had an incurable disease. The king was overwhelmed with grief and cried aloud. Then the physician added, "His disease is love, love for a woman, but a hopeless love."