Job 28:14 - Matthew Poole's English Annotations on the Holy Bible

The depth, to wit, of the earth, because the sea here follows as a differing place. This is a very common figure, whereby speech is ascribed to dumb and senseless creatures. The meaning is, This is not to be found in any part of the land or sea, yea, though a man should dig or dive never so deep to find it, nor to be learned from any creatures; for though these discover the being, and power, and in part the wisdom of God, yet they do not instruct us in the methods and grounds of God's providential dispensations to good and evil men: these are secrets of wisdom reserved for God himself.