Has the bright sun set,
Has the gale grown stronger?
Still we’ll not grieve yet:
We will sing a while longer!


Has our youth been met
By Time the wronger?
Let us not grieve yet,
Let us sing a while longer!


Is the world beset,
Do the sorrows throng her?
Let us not grieve yet:
Let us sing a while longer!

Edwin Markham

http://www.poemhunter.com/poem/sing-a-while-longer/