At the same time my reason returned unto me - Showing that he regarded himself as having been insane.
And for the glory of my kingdom - That is, his restoration to the exercise of his reason contributed to the glory of his kingdom, either by the acts of justice and beneficence which he intended should characterize the remainder of his reign, or by his purpose to reform the abuses which had crept into the government while he was deprived of his reason, or by his determination to complete public works which had been purposed or commenced before his affliction.
Mine honor and brightness returned unto me - Evidently referring to his intellect. He was again restored to that strength and clearness of understanding by which, before his affliction, he had been able to do so much for the glory of his kingdom.
And my counselors and my lords sought unto me - As they had done formerly. During his state of mental alienation, of course, the great lords of the empire would not resort to him for counsel.
And excellent majesty was added unto me - Majesty and honor appropriate to my state, instead of the treatment incident to the condition of a maniac; Theodotion renders this, “and greater majesty was added to me.” It is by no means improbable that additional honor would be conferred on the recovered monarch.