Ecclesiastes 2:20-26

Therefore I turned my heart and despaired of all the labor in which I had toiled under the sun. For there is a man whose labor is with wisdom, knowledge, and skill; yet he must leave his heritage to a man who has not labored for it. This also is vanity and a great evil. For what has man for all his labor, and for the striving of his heart with which he has toiled under the sun? For all his days are sorrowful, and his work burdensome; even in the night his heart takes no rest. This also is vanity. Nothing is better for a man than that he should eat and drink, and that his soul should enjoy good in his labor. This also, I saw, was from the hand of God. For who can eat, or who can have enjoyment, more than I? For God gives wisdom and knowledge and joy to a man who is good in His sight; but to the sinner He gives the work of gathering and collecting, that he may give to him who is good before God. This also is vanity and grasping for the wind.