There is one alone, and there is not a second; yes, he hath neither child nor brother: yet is there no end of all his labor; neither is his eye satisfied with riches; neither saith he, For whom do I labor, and bereave my soul of good? This is also vanity, yes, it is a grievous labor.

I considered all the living who walk under the sun, with the second child that shall stand up in his stead.