I have three quotes, from Mark Twain, that I would like to add to this conversation.
Mark Twain wrote:
"It is better to keep your mouth closed and let people think you are a fool than to open it and remove all doubt."
"Habit is habit and not to be flung out of the window by any man, but coaxed downstairs a step at a time."
"The right word may be effective, but no word was ever as effective as a rightly timed pause."
Although I admit this one doesn't work so well on a forum
Also, one from Confucius:
Confucius wrote:
"Things that are done, it is needless to speak about...things that are past, it is needless to blame."
I hope that provided either enlightenment, or humor.