"The greatest minds are those who are not afraid to be wrong."

"We are all too much inclined, I think, to put off until tomorrow the things that we ought to do today."

"Leave the beaten track occasionally and dive into the woods. Every time you do so you will be certain to find something that you have never seen before."

"If it is not necessary, it is obviously not advisable, that deaf children should acquire, and use, as their ordinary and habitual means of communication — their vernacular in fact — a language that is…"

"All really big discoveries are the results of thought."