Alexander Graham Bell — "The greatest minds are those who are not afraid to be wrong."

"The inventor... looks upon the world and is not contented with things as they are. He wants to improve whatever he sees, he wants to benefit the world; he is haunted by an idea. The spirit of inventio…"

"We should try ourselves to forget that they are deaf. We should try to teach them to forget that they are deaf."

"Wherever you may find the inventor, you may give him wealth or you may take from him all that he has; and he will go on inventing. He can no more help inventing than he can help thinking or breathing."

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

"The most important thing is to keep on trying, to never give up."