Alexander Graham Bell — "Observe, Remember, Compare."

"The day will come when the man at the telephone will be able to see the distant person to whom he is speaking."

"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."

"We are all too much inclined to follow the beaten paths of others, and it is only by striking out into new and untrodden ground that any discovery can be made."

"The only way to do great work is to love what you do. If you haven't found it yet, keep looking. Don't settle."

"The main object of the education of the deaf is to fit them to live in the world of a hearing-speaking people."