"A man's own judgement should be the final appeal in all that relates to himself."

"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 …"

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

"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…"

"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."