'Decided' in the Bible

I decided to carefully and thoroughly examine all that has been accomplished on earth. I concluded: God has given people a burdensome task that keeps them occupied.

So I decided to discern the benefit of wisdom and knowledge over foolish behavior and ideas; however, I concluded that even this endeavor is like trying to chase the wind!

Next, I decided to consider wisdom, as well as foolish behavior and ideas. For what more can the king's successor do than what the king has already done?