I should include 
Don't say you don't have enough time. You have exactly the same number of hours per day that were given to Helen Keller, Pasteur, Michaelangelo, Mother Teresa, Leonardo da Vinci, Thomas Jefferson, and Albert Einstein.--H. Jackson Brown
If a million people say a foolish thing, it is still a foolish thing. -Anatole France Jacques Anatole Thibault (1844-1924)
Why does the Air Force need expensive new bombers? Have the people we've been bombing over the years been complaining?--George Wallace
It is dangerous to be right in matters on which the established authorities are wrong.-Voltaire
It's kind of fun to do the impossible.--Walt Disney
It is not enough to do your best; you must know what to do, and THEN do your best.--W. Edwards Deming
A cynic is a man who knows the price of everything, and the value of nothing.--Oscar Wilde
We think in generalities, but we live in details.--Alfred North Whitehead (1861-1947)
"Experience is that marvellous thing that enables you recognise a mistake when you make it again." -- Franklin P. Jones
"Some studies show that successful entrepreneurs often have the same characteristics as children with attention deficit disorders. They are curious, impatient, fast moving, and uninterested in the trivia or details of a school subject or, later in life, of the details of a business." - Brian Tracy
"A ship in port is safe, but that's not what ships are built for." -- Grace Murray Hopper
My opinions may have changed, but not the fact that I'm right. -- ???
Don't go around saying the world owes you a living; the world owes you nothing; it was here first.
Act in the valley so that you need not fear those who stand on the hill.-Danish proverb