I will be - Or, I am. There was a time when Solomon thought himself wise enough to comprehend the work of God, and therefore needed for himself the self-humbling conviction declared in this verse.
It - i. e. Wisdom. Compare Ecclesiastes 8:17.
Related Commentaries of Ecclesiastes 7:23
Ecclesiastes 7:23
23 All this have I proved by wisdom: I said, I will be wise; but it was far from me.