“...[H]uman reason in its pure use, so long as it was not critically examined, has first tried all possible wrong ways before it succeeded in finding the one true way.” SuccessFailureIncorrect Focus Book:Fundamental Principles of the Metaphysic of Morals: & The Metaphysical Elements of Ethics Source: Fundamental Principles of the Metaphysic of Morals: & The Metaphysical Elements of Ethics