Do better now, my child...

I find this poem devastating...

He came to my desk with a quivering lip, 
the lesson was done. 
“Have you a new sheet for me, dear teacher? 
I’ve spoiled this one.”
 I took his sheet, all soiled and blotted, 
And gave him a new one all unspotted.
 And into his tired heart I cried, 
“Do better now, my child.”

I went to the throne with a trembling heart,
 the day was done.
 “Have you a new day for me, dear Master?
 I’ve spoiled this one.”
 He took my day, all soiled and blotted, 
and gave me a new one all unspotted. 
And into my tired heart he cried, 
“Do better now, my child.”

Attributed to Katherine Wheeler