Read Ecclesiastes 2:19 Using Other Translations
And who knoweth whether he shall be a wise man or a fool? yet shall he have rule over all my labour wherein I have laboured, and wherein I have shewed myself wise under the sun. This is also vanity.
and who knows whether he will be wise or a fool? Yet he will be master of all for which I toiled and used my wisdom under the sun. This also is vanity.
And who can tell whether my successors will be wise or foolish? Yet they will control everything I have gained by my skill and hard work under the sun. How meaningless!