The earth takes shape like clay under a seal; its hills stand out like the folds of a garment.
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
It is turned as clay to the seal,.... As the clay receives a different form by the impress of the seal upon it, so the earth appears in a different manner by the spring of morning light upon it; in the darkness of the night nothing of its form and beauty is to be seen; it is a mere "tohu" and "bohu", like the chaos...
Explaining the first clause of Job 38:13, as Job 38:15 does the second clause. As the plastic clay presents the various figures impressed on it by a seal, so the earth, which in the dark was void of all form, when illuminated by the dayspring, presents a variety of forms, hills, valleys, &c.