How dare the robins sing

How dare the robins sing,
When men and women hear
Who since they went to their account
Have settled with the year! --
Paid all that life had earned
In one consummate bill,
And now, what life or death can do
Is immaterial.
Insulting is the sun
To him whose mortal light,
Beguiled of immortality,
Bequeaths him to the night.
In deference to him
Extinct be every hum,
Whose garden wrestles with the dew,
At daybreak overcome!