'Concluded' in the Bible

I concluded that wisdom is more useful than foolishness, just as light is more useful than darkness.

I have concluded that the only worthwhile thing for them is to take pleasure in doing good in life;

I have concluded that everything that God undertakes will last for eternity nothing can be added to it nor taken away from it and that God acts this way so that people will fear him.

I concluded that it is worthwhile for people to find joy in their accomplishments, because that is their inheritance, since who can see what will exist after them?

Here is a pointless thing that happens on earth: A righteous man receives what happens to the wicked, and a wicked man receives what happens to the righteous. I concluded that this, too, is pointless.

So I concluded, "Wisdom is better than strength. Nevertheless, the wisdom of the poor is rejected his words are never heard."