in Thoreau’s Journal:

I see some naked viburnum berries red and some purple now. There are berries which men do not use, like choke-berries, which here in Hubbard’s Swamp grow in great profusion and blacken the bushes. How much richer we feel for this unused abundance and superfluity! Nature would not appear so rich, the profusion so rich, if we knew a use for everything.