'Seen' in the Bible

I have seen all the works that are done under the sun; and, behold, all is vanity and vexation of spirit.

I have seen the travail, which God hath given to the sons of men to be exercised in it.

Yea, better is he than both they, which hath not yet been, who hath not seen the evil work that is done under the sun.

There is a sore evil which I have seen under the sun, namely, riches kept for the owners thereof to their hurt.

Behold that which I have seen: it is good and comely for one to eat and to drink, and to enjoy the good of all his labour that he taketh under the sun all the days of his life, which God giveth him: for it is his portion.

There is an evil which I have seen under the sun, and it is common among men:

Moreover he hath not seen the sun, nor known any thing: this hath more rest than the other.

Yea, though he live a thousand years twice told, yet hath he seen no good: do not all go to one place?

All things have I seen in the days of my vanity: there is a just man that perisheth in his righteousness, and there is a wicked man that prolongeth his life in his wickedness.

All this have I seen, and applied my heart unto every work that is done under the sun: there is a time wherein one man ruleth over another to his own hurt.

This wisdom have I seen also under the sun, and it seemed great unto me:

There is an evil which I have seen under the sun, as an error which proceedeth from the ruler:

I have seen servants upon horses, and princes walking as servants upon the earth.