'Concluded' in the Bible

So I concluded that there is nothing better for a person than to enjoy [the fruit of] his labor, for this is his lot in life. {For no one knows what will happen in the future.}

So all this I laid to my heart, and I concluded that the righteous and the wise, as well as their deeds, [are] in the hand of God. So no one knows anything that will [come] to them, whether [it will be] love or hatred.

So I concluded that wisdom [is] better than might, yet the wisdom of the poor is despised, and his words are not heard.