There is indeed a mine for silver, and a place for gold which men refine. Iron is taken from the earth, and copper is melted out of stone... The earth, though out of it comes forth bread, is in fiery upheaval underneath. Its stone are the source of sapphires, and there is gold in its dust.
But whence can wisdom be obtained, and where is the place of understanding?
God knows the way to it; it is he who is familiar with its place. For he beholds the ends of the earth and sees all that is under the heavens.