Whence it is, that amazed I hear
From yonder withered spray,
This foremost morn of all the year,
The melody of May?

And why, since thousands would be proud
Of such a favour shown,
Am I selected from the crowd
To witness it alone?

Sing'st thou, sweet Philomel, to me,
For that I also long
Have practised in the groves like thee,
Though not like thee in song?

Or sing'st thou rather under force
Of some divine command,
Commissioned to presage a course
Of happier days at hand?

Thrice welcome then! for many a long
And joyless year have I,
As thou to-day, put forth my song
Beneath a wintry sky.

But Thee no wintry skies can harm,
Who only need'st to sing,
To make even January charm,
And every season Spring.

William Cowper

http://www.poemhunter.com/poem/to-the-nightingale-which-the-author-heard-sing-on-new-year-s-day/