The optimist fell ten stories;
  At each window bar
He shouted to his friends:
  "All right so far." (Anonymous)

There is so much good in the worst of us,
And so much bad in the best of us,
That it ill behoves any of us,
To find fault with the rest of us. (Anonymous)

If you your lips would keep from slips,
  Five things observe with care:
Of whom you speak, to whom you speak,
  And how and when and where. (Anonymous)

A wise old owl lived in an oak;
The more he saw the less he spoke;
The less he spoke the more he heard:
Why can't we all be like that bird? (Edward Hersey Richards)