"Our virtues and our failings are inseparable, like force and matter. When they separate, man is no more."

"I have been so misunderstood, so misrepresented, so abused, by my enemies, that it is a wonder I am still alive."

"The greatest discoveries have been made by men of science who have not been afraid to depart from the beaten path."

"I have been called by some a visionary, by others a dreamer, but I am a practical man."

"We crave for new sensations but soon become indifferent to them. The wonders of yesterday are today common occurrences."