'Knows' in the Bible

And who knows [whether] he will be wise or foolish? Yet he will exercise control of all [the fruit of] my toil with which I toiled wisely under the sun. This also [is] vanity!

For no one knows [whether] the spirit of a human ascends [to heaven] and [whether] the spirit of the beast descends to the ground!

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.}

A poor but wise youth [is] better than an old but foolish king who no longer knows {how to receive advice}.

For who knows what [is] good for a man in his life during the few days of his fleeting life, which are fleeting as a shadow? For who can tell anyone what will happen {in the future} under the sun?

For your heart knows that you also have cursed others many times.

Who [is] like the sage? Who knows [the] interpretation of a thing? A man's wisdom makes his face shine, and the hardness of his face is changed.

Whoever obeys [his] command will not suffer disaster. The wise mind knows the [proper] time and the right [procedure].

Surely no one knows what will be, so who can tell anyone what will happen?

Then I saw all the work of God--man [is] not able to discover the work that is done under the sun. Although man may toil in seeking, he cannot find it. Even if a wise man claims [that he] knows it, he cannot find it.

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.

Whatever your hand finds to do--do [it] with [all] your might; for in Sheol--where you are going--no one works, plans, knows, or thinks about anything.

The fool {talks too much}, for no one knows what will be. Who can tell anyone what will happen {in the future}?