Have you journeyed to the vents of the sea or walked in the trenches of the deep?
The Lord here proceeds to ask Job many puzzling questions, to convince him of his ignorance, and so to shame him for his folly in prescribing to God. If we will but try ourselves with such interrogatories as these, we shall soon be brought to own that what we know is nothing in comparison with what we know not.
Commenting on Job 38:12-24
Hast thou entered into the springs of the sea?.... The subterraneous passages through which the waters flow into the sea and supply it; or the springs and fountains that rise up at the bottom of it (i); and some tell us of springs of sweet water that rise there, even though the water at the bottom of the sea is saltier than on the surface...
springs--fountains beneath the sea (Psa 95:4-5). search--Rather, "the inmost recesses"; literally, "that which is only found by searching," the deep caverns of ocean.