Here are some interesting passages from The Secret History of the Court of Justinian, by Procopius:
[Chapter VIII] He was always a liar not merely on the spur of the moment; he drew up documents and swore the most solemn oaths to respect the covenants which he made with his subjects; then he would straightway break his plighted word and his oath, like the vilest of slaves, who perjure themselves and are only driven to confess through fear of torture.
[Chapter XI] When Justinian came to the throne, he straightway succeeded in upsetting everything. What had previously been forbidden by the laws he introduced, while he abolished all existing institutions, as though he had assumed the imperial robe for no other purpose than to alter completely the form of government. He did away with existing offices, and established other new ones for the management of affairs. He acted in the same manner in regard to the laws and the army; not that he was led to do so by any love of justice or the public advantage, but merely in order that all institutions might be new and might bear his name; if there was any institution that he was unable to abolish at once, he gave it his name, that at least it might appear new.
[Chapter XIII] Justinian's character was weaker than water, and anyone could lead him whither he would, provided it was not to commit any act of kindness or incur the loss of money. He especially delighted in flattery, so that his flatterers could easily make him believe that he should soar aloft and tread upon the clouds.
[Chapter XIII] As an enemy, he was obstinate and relentless; as a friend, inconstant; for he made away with many of his strongest partisans, but never became the friend of anyone whom he had once disliked. Those whom he appeared to consider his nearest and dearest friends he would in a short time deliver up to ruin to please his wife or anyone else, although he knew well that they died only because of devotion for him; for he was untrustworthy in all things save cruelty and avarice, from which nothing could restrain him.
[Chapter XXVII] He was utterly without shame; he had no care for the interests or advantage of the state, and did not trouble himself about excusing his misdeeds, or, in fact, about anything else but how he might plunder and appropriate the wealth of the whole world.
[Chapter XXIX] Who would not consider that state to be in a most pitiable condition, in which the sovereign allows himself to be bribed to leave charges uninvestigated, and in which malcontents venture without hesitation to attack one of the magistrates within the precincts of the palace, and to lay violent hands upon him?
June 11, 2026.