If I had only known, I would have been a locksmith.
There is nothing new under the sun but there are lots of old things we don't know.
Cogito cogito ergo cogito sum (I think that I think, therefore I think that I am.)
The aim of education is the knowledge, not of facts, but of values.
The trouble with facts is that there are so many of them.
—Samuel McChord Crothers
There are some things children cannot know, because once they learn them they are no longer children.
Its hard to show people everything, you know? You never know what they'll do with it once they have it.
—Nick Burd in The Vast Fields of Ordinary
Every man has his secret sorrows which the world knows not; and often times we call a man cold when he is only sad.
—Henry Wadsworth Longfellow