'Depths' in the Bible

Just then there was a man in their synagogue with an unclean spirit; and he cried out [terribly from the depths of his throat],

Seeing Jesus, he cried out [with a terrible voice from the depths of his throat] and fell down before Him [in dread and terror], and shouted loudly, “What business do we have [in common] with each other, Jesus, Son of the Most High God? I beg You, do not torment me [before the appointed time of judgment]!”

But they [loudly] shouted out all together, saying, “Away with this Man, and release Barabbas to us!”

(Now this expression, “He ascended,” what does it mean except that He also had previously descended [from the heights of heaven] into the lower parts of the earth?

But to the rest of you in Thyatira, who do not hold this teaching, who have not explored and known the depths of Satan, as they call them—I place no other burden on you,