The Debt

Give all in world o' gold and silk,
A gift of ev'ry single breath,
But the debt of mother's milk
Could not be paid in life and death.

on turning twenty

Of my three score years and ten

Twenty would not come again.

So take from seventy springs a score

It leaves me only fifty more.
                           
             -A.E.Housman
how a poet "why, i've  turned twenty years of age sir!"