Authors:

There is no labor from which most people shrink as they do from that of sustained and consecutive thought; it is the hardest work in the world

Wallace D. Wattles (2015). “The Science of Wallace D. Wattles: The Science of Being Well, The Science of Getting Rich & The Science of Being Great – Complete Trilogy: From one of the New Thought pioneers, author of How to Promote Yourself, New Science of Living and Healing, Hellfire Harrison, A New Christ, How to Get What You Want and Jesus The Man and His Work”, p.20, e-artnow
There is no labor from which most people shrink as they do from that of sustained and consecutive thought; it is the hardest work in the world