"The idea of atomic energy is illusionary but it has taken so powerful a hold on the minds, that although I have preached against it for twenty-five years, there are still some who believe it to be rea…"

"I do not marry, for I consider that for an inventor, marriage is a great obstacle."

"In crystal we have a pure evidence of the existence of a formative life principle, and although in spite of everything we cannot understand the life of crystals - it is still a living being."

"I have been so absorbed in my work that I have neglected my personal life."

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