We are always paid for our suspicion by finding what we suspect.

I never found the companion that was so companionable as solitude. [It allows you to] be the Mungo Park, the Lewis and Clark of your own streams and oceans; [to] explore your own higher latitudes; [to] be a Columbus to whole new continents and worlds within you, opening new channels, not of trade, but of thought.

One revelation has been made to the Indian, another to the white man.

The book has never been written which is to be accepted without any allowance.

I realized a school doesn't need a School Committee or Trustees or Governors or lumber or approved textbooks. All a school needs is a mind that sends and minds that receive. I shall teach my own students how to teach themselves. My own school. No buildings. Break out of the classroom prison. All I need is SKY. The Universe can be my classroom - the great vast world of the Concord countryside.

We shall see but a little way if we require to understand what we see.

For an impenetrable shield, stand inside yourself