There's nothing ambiguous about the original aphorism read in isolation - you're the one who introduced the ambiguity by raising a piece of the surrounding context, prompting me to resolve the ambiguity by noting the rest of the surrounding context. Nonetheless, a foolish consistency being the hobgoblin of little minds, I shall amend my argument. My new argument is in agreement with yours that Emerson is meant to be read as pithy slogans and nothing he's ever written is deep enough to warrant even a fraction of this amount of parsing. Like J.D. Salinger or Ayn Rand, the profundity of Emerson takes a Coyote-style nosedive around the time one graduates from high school. Also, I can't believe the "foolish consistency" bit from the movie Next Stop Wonderland is unavailable on YouTube.
But perhaps Whitman indeed settles the matter. I present to you, Leaves of Grass Oxford commas:
"The sniff of green leaves and dry leaves, and of the shore and
dark-color'd sea-rocks, and of hay in the barn. . . ."
"They were the glory of the race of rangers,
Matchless with horse, rifle, song, supper, courtship,
Large, turbulent, generous, handsome, proud, and affectionate. . . ."
"Wheeze, cluck, swash of falling blood, short wild scream, and long, dull, tapering groan,
These so, these irretrievable."
"Askers embody themselves in me and I am embodied in them,
I project my hat, sit shame-faced, and beg."
"If I, you, and the worlds, and all beneath or upon their surfaces, were this moment reduced back to a pallid float, it would not avail in the long run. . . ."