26Behold, God is great, and we know him not;the number of his years is unsearchable.
If God’s works are too great for us to understand (Job 36:23–25), then how can we expect to understand God himself? To illustrate his point, Elihu refers to God’s eternity. This is one of God’s attributes which is unsearchable.
26 Behold, God is great, and we know him not; the number of his years is unsearchable.