What does 2 Kings 19:23 mean?

'Through your messengers, you bragged, “With my many chariots I’ve climbed the highest mountains, even the peaks of Lebanon. I’ve cut down its tallest cedars and best cypress trees. I’ve reached its farthest heights, its densest forests.”' 2 Kings 19:23 - Modern Text Bible

(God repeats Sennacherib’s boasts, showing how he’s been bragging about his power and conquests.)