"I had made up my mind to find that for which I was searching even if it required the remainder of my life. After innumerable failures I finally uncovered the principle for which I was searching, and I…"

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

"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…"

"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 …"

"The telephone will be a great convenience to business men, but it will never be used by the general public."