“It is really amazing what people can do. Only they don't know what they can do.”
“You can change only what people know, not what they do.”
“It's amazing how right you can be about a person you don't know; it's only the people you do know who confuse you.”
“It's amazing how right you can sometimes be about a person you don't know; it's only the people you do know who confuse you.”
“It's amazing what one can accomplish when one doesn't know what one can't do.”
“Humble people know their limitations: they know what they know, and they know what they do not know; they know what they can do or be, and they know what they cannot do or be”