To know that we know what we know and that we do not know what we do not know that is true knowledge.

The bluebird carries the sky on his back.

Perhaps these pages are more particularly addressed to poor students. As for the rest of my readers, they will accept such portions as apply to them. I trust that none will stretch the seams in putting on the coat, for it may do good service to him whom it fits.

True friendship can afford true knowledge. It does not depend on darkness and ignorance.

Pursue some path, however narrow and crooked, in which you can walk with love and reverence.

Most men are satisfied if they read or hear read, and perchance have been convicted by the wisdom of one good book, the Bible, and for the rest of their lives vegetate and dissipate their faculties in what is called easy reading.