Kohelet 2:19

19 And who hath da’as whether he shall be a chacham or a kesil? Nevertheless shall he have shlitah (control, authority) over all my amal for which I have toiled, and have poured out my chochmah under the shemesh. This also is hevel.

Kohelet 2:19 Meaning and Commentary

Ecclesiastes 2:19

And who knoweth whether he shall be a wise [man] or a fool?
&c.] The king that should be after him, as the Targum, that should be his successor and heir; and so whether he would make a good or bad use of what was left; whether he would keep and improve it, or squander it away; suggesting, that could he be sure he would be a wise man that should come into his labours, it would be some satisfaction to him that he had laboured, and such a man should have the benefit of it; but as it was a precarious thing what he would be, he could take no pleasure in reviewing his labours he was about to leave. Some think that Solomon here gives a hint of the suspicion he had, that his son Rehoboam, his successor and heir, would turn out a foolish man, as he did; yet shall he have rule over all my labour wherein I have laboured, and
wherein I have showed myself wise, under the sun;
be he what he will, all will come into his hands; and he will have the power of disposing of all at his pleasure; not only of enjoying it, but of changing and altering things; and perhaps greatly for the worse, if he does not entirely destroy what has been wrought with so much care and industry, toil and labour, wisdom and prudence; the thought of all which was afflicting and distressing: and therefore he adds, This [is] also vanity;
and shows there is no happiness in all that a man does, has, or enjoys; and this circumstance, before related, adds to his vexation and unhappiness.

Kohelet 2:19 In-Context

17 Therefore I hated HaChayyim (Life); because the ma’aseh that is wrought under the shemesh is grievous unto me; for all is hevel and chasing after ruach.

18 Yea, I hated all my amal for which I had toiled under the shemesh; because I must leave it unto the adam that shall occupy my place after me.

19 And who hath da’as whether he shall be a chacham or a kesil? Nevertheless shall he have shlitah (control, authority) over all my amal for which I have toiled, and have poured out my chochmah under the shemesh. This also is hevel.

20 Therefore I turned aside to give up my lev to despair over all the wearisome amal with which I toiled under the shemesh.

21 For there is an adam whose amal is with chochmah, and da’as, and kishron (skill); yet to an adam that hath not worked for it he must leave it for his chelek. This also is hevel and a ra’ah rabbah.