Effort Quotes - Page 96
Rudolf Steiner (2015). “How to Know Higher Worlds”, p.34, RSP
Robert Kuttner (1987). “The Economic Illusion: False Choices Between Prosperity and Social Justice”, p.188, University of Pennsylvania Press
Robert Henri (1960). “The art spirit”, Lippincott Williams & Wilkins
Robert A. Heinlein (1987). “Starship Troopers”, p.76, Penguin
"The Character of Physical Law". Book by Richard P. Feynman, 1965.
Napoleon Hill (2013). “The Law of Success”, p.90, Courier Corporation