Awake! arise! the hour is late!
Angels are knocking at thy door!
They are in haste and cannot wait,
And once departed come no more.

Awake! arise! the athlete's arm
Loses its strength by too much rest;
The fallow land, the untilled farm
Produces only weeds at best.

Henry Wadsworth Longfellow

http://www.poemhunter.com/poem/in-the-harbour-a-fragment/