I found this in a very old book, entitled, "POEMS THAT TOUCH THE HEART"
compiled by A. L. Alexander
Creator of Radio's GOOD WILL COURT
Garden City Publishing Co., Inc.
Garden City,  New York
17th Printing April 1947

ERASERS
author unknown

Erasers are the nicest things!
Of that there is no doubt.
We write wrong words.  A few quick swipes--
And big mistakes fade out.
And you will find erasers,
Of a very different kind,
Extremely helpful, if you will try
To bear these facts in mind:
When you bump someone in a crowd,
And almost knock  her down,
A soft, "I'm sorry!" may bring smiles
And rub out that old frown.
Apologies, invariably,
Obliterate mistakes;
And three small words, "I love you!"
Can erase the worst heartaches.