Then said I in my heart, As it happeneth to the fool, so it happeneth even to me; and why was I then more wise? Then I said in my heart, that this also is vanity.
Why was I then - so anxious to become - "more wise" - (2 Chronicles 1:10.)
Then - since such the case - this also vanity. "This" - namely, pursuit of (worldly) wisdom. It can never fill the place of the true wisdom (Job 28:28; Jeremiah 8:9).