"There is no such thing as a Stupid Question." Albert Einstein. When you think about it no question is really stupid as all questions are intended to increase knowledge.

"If people never did silly things, nothing intelligent would ever get done".  Ludwig Wittgenstein (1889 - 1951)

"There's no point in being grown up if you can't be childish sometimes".  Doctor Who Ok it's from a TV series, but it is just as valid a point.

"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former". Albert Einstein

"Reality is merely an illusion, albeit a very persistent one". Albert Einstein

"Insanity: doing the same thing over and over again and expecting different results". Albert Einstein (attributed)

"The hardest thing in the world to understand is the income tax". Albert Einstein (attributed)

"You live and learn. At any rate, you live". Douglas Adams

"Anyone who is capable of getting themselves made President should on no account be allowed to do the job". Douglas Adams, The Hitchhiker's Guide to the Galaxy

"I don't want to achieve immortality through my work... I want to achieve it through not dying". Woody Allen

"Every artist was first an amateur". Ralph Waldo Emerson

"The reward of a thing well done is to have done it". Ralph Waldo Emerson

"The only way to have a friend is to be one". Ralph Waldo Emerson

"The best way to cheer yourself is to try to cheer someone else up". Mark Twain

"I am, and ever shall be, your friend" Spock