'Thing' in the Bible

The only worthwhile thing for a human being is to eat, drink, and enjoy life's goodness that he finds in what he accomplishes. This, I observed, is also from the hand of God himself,

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

"Look at this," says the Teacher. "Linking one thing to another, I reached this conclusion:

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.