But, notwithstanding all that they could do, the influence of Sophia increased continually, until the course of public affairs came to be, in fact, almost entirely under her direction. The chief minister of state was a certain Prince Galitzin, who was almost wholly devoted to her interests. Indeed, it was through her influence that he was appointed to his office. Things continued in this state for about six years, and then, at length, Theodore was taken suddenly sick. It soon became evident that he could not live. On his dying bed he designated Peter as his successor, passing over his brother John. The reason for this was that John was so extremely feeble and infirm that he seemed to be wholly unfit to reign over such an empire. Besides various other maladies under which he suffered, he was afflicted with epilepsy, a disease which rendered it wholly unsuitable that he should assume any burdens whatever of responsibility and care. It is probable that it was through the influence of some of the nobles who were opposed to Sophia that Theodore was induced thus to designate Peter as his successor. However this may be, Peter, though then only ten years old, was proclaimed emperor by the nobles immediately after Theodore's death. Sophia was much disappointed, and became greatly indignant at these proceedings. John was her own brother, while Peter, being a son of the second wife, was only her half-brother. John, too, on account of his feeble health, would probably never be able to take any charge of the government, and she thought that, if he had been allowed to succeed Theodore, she herself might have retained the real power in her hands, as regent, as long as she lived; whereas Peter promised to have strength and vigor to govern the empire himself in a few years, and, in the mean time, while he remained in his minority, it was natural to expect that he would be under the influence of persons connected with his own branch of the family, who would be hostile to her, and that thus her empire would come to an end. So she determined to resist the transfer of the supreme power to Peter. She secretly engaged the Guards on her side. The commander-in-chief of the Guards was an officer named Couvansky. He readily acceded to her proposals, and, in conjunction with him, she planned and organized a revolution.