Success is not forever and failure isn’t fatal.

The line argues for resilience and perspective. “Success is not forever” warns against treating achievement as permanent; it can fade if it breeds complacency. “Failure isn’t fatal” counters the opposite trap: interpreting setbacks as definitive judgments. Together, the clauses promote a disciplined middle ground—learn from outcomes but don’t be ruled by them. In leadership terms, it encourages maintaining standards and effort independent of short-term results, a mindset especially suited to competitive environments where performance is iterative and improvement depends on responding constructively to both praise and disappointment.