Art thou the first man that was born? - Hast thou lived ever since the creation, and treasured up all the wisdom of past times, that thou dost now speak so arrogantly and confidently? This question was asked, because, in the estimation of Eliphaz and his friends, wisdom was supposed to be connected with long life, and with an opportunity for extended and varied observation; see Job 15:10. Job they regarded as comparatively a young man.
Wast thou made before the hills - The mountains and the hills are often represented as being the oldest of created objects, probably because they are the most ancient things that appear on earth. Springs dry up, and waters change their beds; cities are built and decay; kingdoms rise and fall, and all the monuments of human skill and art perish; but the hills and mountains remain the same from age to age. Thus, in Psalms 90:2 :
Before the mountains were brought forth,
Or ever thou hadst formed the earth and the world,
Even from everlasting to everlasting thou art God.
So in Proverbs 8:25, in the description of wisdom:
Before the mountains were settled,
Before the hills was I brought forth.
So the hills are called “everlasting” Genesis 49:26, in allusion to their great antiquity and permanence. And so we, in common parlance, have a similar expression when we say of anything that “it is as old as the hills.” The question which Eliphaz intends to ask here of Job is, whether he had lived from the creation, and had observed everything?