Classic Poem

Daisy dear:
Look as far as you can:
Is this a white world we live in?
No sir, it has its yellow as well.

But daisy:
The next field, the next and beyond?
They have their yellow as well.

But daisy:
It should be, will be a white world we live in?
It isn't a matter of should, sir, or will;
Nor would I have should if I could!