They utter and speak - יביאו yabbiu, their hearts get full of pride and insolence; and then, from the abundance of such vile hearts, the mouth speaks; and the speech is of hard things, threatening which they are determined to execute, boastings of their power, authority, etc.
How long shall they utter and speak hard things? - The word rendered utter means to pour forth - as water from a fountain; to pour forth copiously. The meaning is, that they seemed to be full, and that they poured forth evil words as a fountain pours forth water. The phrase “hard things” means proud, unfeeling, insolent things; things which are unjust, unkind, severe, harsh.
And all the workers of iniquity boast themselves? - Boast of their power and their success. How long shall they be permitted to have such success as may seem to justify them in their exultation?