"Don't keep your own schedule - that will eat too much of your time keeping your own schedule. And when you are tired, stop. Because if you are too tired, you become not productive, and you are wasting time."

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If humans are not required to earn a living to be provided survival needs, many are going to want very much to be productive, but not at those tasks they did not choose to do but were forced to accept in order to earn money. Instead, humans will spontaneously take upon themselves those tasks that world society really needs to have done.

— R. Buckminster Fuller