Summary
This quote suggests that theories or ideas that contradict the fundamental aspects of human nature are bound to fail. It implies that any theory or belief system that does not align with our inherent tendencies, instincts, and behaviors is not sustainable in the long run. Such theories may lack practicality or fail to address the essential needs and characteristics of human beings, rendering them incapable of gaining widespread acceptance or translating into successful outcomes. Ultimately, for a theory to be effective, it must acknowledge and account for the realities of human nature.