“People know what they do; they frequently know why they do what they do; but what they don’t know is what what they do does.”

“People know what they do; frequently they know why they do what they do; but what they don't know is what what they do does.”

“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”

“Then why do you want to know?""Because learning does not consist only of knowing what we must or we can do, but also of knowing what we could do and perhaps should not do.”

“What do you know that you’re not telling me?""I don’t know what you know, so I don’t know what you don’t know.”

“A nation which does not remember what it was yesterday, does not know what it is today, nor what it is trying to do. We are trying to do a futile thing if we do not know where we came from or what we have been about.”