Nikola Tesla Quotes about Energy
Every effort under compulsion demands a sacrifice of energy. I never paid such a price.
Nikola Tesla (2014). “My Inventions Nikola Tesla's Autobiography”, p.2, Lulu.com
Nikola Tesla (2013). “The Problem of Increasing Human Energy, With Special References to the Harnessing of”, p.25, Simon and Schuster
"The Problem of Increasing Human Energy". "Century" Illustrated Magazine, Volume 60, June 1900.