'Great Things' in the Bible

I considered the horns, and, behold, there came up among them another horn, a little one, before which three of the first horns were plucked up by the roots: and, behold, in this horn were eyes like the eyes of a man, and a mouth speaking great things.

and concerning the ten horns that were on its head, and the other horn which came up, and before which three fell, even that horn that had eyes, and a mouth that spake great things, whose look was more stout than its fellows.