Solomon is, again, looking at the meaninglessness of life lived apart from God, a life lived only for the immediate pleasures of this world. It has to be meaningless because when it's all done, humans and beasts "all go unto one place; all are of the dust, and all turn to dust again" (vs. 20). As we saw in Tuesday's lesson, that's a conclusion most humans find unsettling, one that makes all that comes before death not only hebel but even worse. One atheist author wrote about the "absurdity" of life: It taunts us with the hope and promise of meaning, and yet in the end we all end up in the same meaningless place as the beasts.