The Order of Essenes was a New Thought correspondence school founded in 1938 by Burks L. Hamner. The Order of Essenes supplied lessons to its students free of charge, supporting the work entirely through donations, and this website does the same.
Hamner called his teachings Life Science: a genuine science of living that can be applied by anyone to attain health, happiness, and success. A successful businessman and philanthropist, Hamner studied the New Thought teachings of his time carefully, taking the best principles from the systems he encountered and testing them relentlessly in the laboratory of his own life. The resulting teachings were published in a series of courses, each of them divided up into weekly lessons.
They can all be found now online here - https://www.orderofessenes.org/