'Behold' in the Bible

I have seen all the works that are done under the sun; and, behold, all is vanity and a striving after wind.

I said in my heart, Come now, I will prove thee with mirth; therefore enjoy pleasure: and, behold, this also was vanity.

Then I looked on all the works that my hands had wrought, and on the labor that I had labored to do; and, behold, all was vanity and a striving after wind, and there was no profit under the sun.

And I turned myself to behold wisdom, and madness, and folly: for what can the man do that cometh after the king? even that which hath been done long ago.

Then I returned and saw all the oppressions that are done under the sun: and, behold, the tears of such as were oppressed, and they had no comforter; and on the side of their oppressors there was power; but they had no comforter.

Behold, that which I have seen to be good and to be comely is for one to eat and to drink, and to enjoy good in all his labor, wherein he laboreth under the sun, all the days of his life which God hath given him: for this is his portion.

Behold, this have I found, saith the Preacher, laying one thing to another, to find out the account;

Behold, this only have I found: that God made man upright; but they have sought out many inventions.

Truly the light is sweet, and a pleasant thing it is for the eyes to behold the sun.