"The future of Russia is in its oil and its people."

"Refrain from illusions, insist on work, and not on words, patiently search divine and scientific truth."

"My main interest is to help my country, Russia, develop its industrial capacity."

"When we see the order of the elements, we must admit that there is a higher reason."

"I think that scientific predictions, if they are to be truly scientific, must be capable of being disproven."