In the chorus ("All the things I want today / All the things I wasted on the way"), a second vocal part comes in to harmonize with the lead vocal, and because there are two voices, there's a slight sense of the entirety of these "all"s.
A few days ago, I figured out the chords and discovered some connections between the progression and the lyrics. The first line of each verse is:
D major | C major | G major | D major
And the second line is:
D major | C major | G major
Compared to the previous line, there's a D major missing at the end of this line, and to some degree, this lack matches "no one's there" in the first verse ("See the sun, it shines right through my door, but no one's there") and "forgotten, left behind" in the third ("See this dried up broken straw, forgotten, left behind").
