There is no failure except in no longer trying. There is no defeat except from within, no really insurmountable barrier save our own inherent weakness of purpose.

The saying reframes “failure” and “defeat” as primarily internal conditions rather than external outcomes. It argues that setbacks, obstacles, and losses do not constitute true failure so long as one continues to act; the only definitive failure is surrender. Likewise, “defeat” is cast as a collapse of morale, will, or self-belief—something that happens “from within” when purpose weakens. The final clause intensifies the claim by locating the most formidable barrier not in circumstance but in wavering resolve. As a piece of motivational aphorism, it emphasizes perseverance, agency, and character, suggesting that endurance and intention are the decisive measures of success.