Poem - The Question

This is from The Book of Virtues on Google books:
The Question
Were the whole world good as you –
–not an atom better
Were it just as pure and true,
Just as pure and true as you;
Just as strong in faith and works;
Just as free from crafty quirks;
All extortion, all deceit;
Schemes its neighbors to defeat;
Schemes its neighbors to defraud;
Schemes some culprit to applaud-
would this world be better?
If the whole world followed you––
followed to the letter–
Would it be a nobler world,
All deceit and falsehood hurled
From it altogether;
Malice, selfishness, and lust,
Banished from beneath the crust,
Covering human hearts from view–
Tell me, if the world followed you––
Would this world be better?

      I had a bit of this poem memorized from somewhere "If the world followed you, followed to the letter, tell me, if it followed you, would the world be better?"  I wanted to add it to my facebook page as my current favorite quote.  Not knowing the author, I did a bit of googling and found that it's from a longer poem and no author is listed.  Now I'd love to know who wrote it but in the mean time I just think it's a good poem to live by.