Alexander Graham Bell — "The invention of the telephone was the result of long and patient investigation."

"Before anything else, preparation is the key to success."

"Before you can achieve anything, you must know what you want. And you must be prepared to sacrifice your comfort to get it."

"You cannot force ideas. Successful ideas are the result of slow growth. Ideas do not reach perfection in a day, no matter how much study is put upon them. It is perseverance in the pursuit of studies …"

"We should try to prevent the propagation of the unfit."

"I have never seen the slightest scientific proof of the religious theories of the creation of the world, and I do not believe any such proof will be found."