Like so many great catchphrases, this one comes from the Bible. More specifically, it can be found in the passage from Ecclesiastes quoted in the second epigraph (see "What's Up With the Epigraph?"). Basically, the title concisely reaffirms the statement made in said passage: in a nutshell, humans are just a small and ephemeral part of a larger world. We come and go, but the earth always remains (remember, this was written in the days before global warming). The sun will keep rising and setting long after all of us are dead and gone. Cheery, huh?