'Seen' in the Bible

I have seen the busyness God gives to {humans} to preoccupy them.

But better [off] than both of them is the one who has not yet been born and has not seen the evil deeds that are done under the sun.

There is a grievous evil which I have seen under the sun: wealth {hoarded} by its owner to his harm.

Here is another misfortune that I have seen under the sun, and it [is] prevalent among humankind.

He has neither seen nor known the sun, yet he has more rest than him.

I have seen all these things in my vain life: Sometimes a righteous man perishes in [spite of] his righteousness, and sometimes a wicked man lives a long life in [spite of] his evil.

I have also seen this [example of] wisdom under the sun, and it [seemed] great to me.

There is an evil I have seen under the sun-- [it is] an error that proceeds from a ruler!

I have even seen slaves [riding] on horses and princes walking like slaves on the earth!