When its a theory, does it matter? The theory of gravity exists and we take the existence of gravity as a fact. If we have enough science and proof behind the theory, it soon becomes a fact. At this point, with a plethora of corroborating evidence, the TEDx talk below by Jesse Henry should in reality be a "Fact". Which might change the title to "The Facts and Reality of Success".
Fair warning, Jesse Henry will begin with a "rope-a-dope". Instead of feeling resentment, you will have an appreciation of his perspective and it will draw you in.
Perspective, Strategy and Execution.