"But often what the world calls nonsensical, becomes practical, does it not? You were called crazy, too, once, were you not?"

"Great discoveries and improvements invariably involve the cooperation of many minds."

"When one door closes another door opens; but we so often look so long and so regretfully upon the closed door, that we do not see the ones which open for us."

"Any one, if he will only observe, can find some little thing he does not understand as a starter for an investigation."

"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…"