"I myself eschew all stimulants. I also practically abstain from meat."

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

"The future of humanity lies in the utilization of the sun's energy."

"The human being is a self-propelled automaton entirely under the control of external influences. Willful and predetermined though they appear, his actions are governed not from within, but from withou…"

"Every effort under compulsion demands a sacrifice of life-energy. I never paid such a price. On the contrary, I have thrived on my thoughts."