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

"If I try to continue a broken line of thought, I feel a veritable spiritual nausea, then, almost by chance, I go over to another job, surprised by the freshness of mind and ease with which I overcome …"

"I am willing to sacrifice my life for the benefit of humanity."

"The time will come when the forces of the universe will be brought under the control of man."

"The spread of civilization may be likened to a fire; first, a feeble spark, next a flickering flame, then a mighty blaze, ever increasing in speed and power."