Success is not forever, and failure's not fatal.

The line urges emotional steadiness in a results-driven profession: neither winning nor losing should be treated as a permanent verdict. “Success is not forever” cautions against complacency and ego after achievement; “failure’s not fatal” rejects despair and encourages learning and persistence after setbacks. In a coaching context, it frames performance as cyclical—each season, game, or decision resets the challenge—so the proper response to both triumph and defeat is disciplined preparation and resilience rather than overreaction. The sentiment also echoes a broader tradition of motivational aphorisms that separate short-term outcomes from long-term character and process.