Like "say," the word "speak" refers to thoughts and feelings moving from our more internal spiritual levels to our more external ones -- and ultimately from the Lord, who is in a sense the most internal spiritual level of all. This is generally called "influx" and "perception" in the Writings, meaning they are thoughts and feelings that flow in in a complete way from the Lord, rather than being things we have to think about and figure out. On a number of occasions "speak" and "say" are used together; in these cases "speak" refers more to intellectual instruction in matters of thought and "say" refers more to feelings and affections that flow in directly.

'Sennacherib,' the king of Assyria, as in 2 Kings 18:19, represents the natural self regarding the intellectual mind.

In Isaiah 37:25, this signifies the rational perverted, destroying all knowledge and perception of what is true. (Apocalypse Explained 518[36])

(Odkazy: Apocalypse Explained 654)