Proud beasts have never trodden it; no lion has ever prowled over it.
Here Job shows, 1. What a great way the wit of man may go in diving into the depths of nature and seizing the riches of it, what a great deal of knowledge and wealth men may, by their ingenious and industrious searches, make themselves masters of.
Commenting on Job 28:1-11
The lion's whelps have not trodden it, nor the fierce lion passed by it. Or "upon it" (e); such creatures that are exceeding fierce and cruel, hungry and voracious, eager after their prey, range here and there in pursuit of it, search every hole and corner, and rove in dens and caves of the earth; yet these never traversed such ways and paths the miners...
lion's whelps--literally, "the sons of pride," that is, the fiercest beasts. passed--The Hebrew implies the proud gait of the lion. The miner ventures where not even the fierce lion dares to go in pursuit of his prey.