Your terrors surround me like a flood;
they have completely engulfed me.
You have taken my companions and loved ones from me;
darkness is my closest friend.
Psalm 88:14-18
Like being lost at sea in thick fog, these deep-water terrors describe clinical depression - an ordeal of extreme mental suffering and hopelessness.
We might wonder what a poem like this is doing in a book of faith like the Bible.