Chénggōng xūyào jiānrènbùbá de jīngshén hé búduàn de nǔlì.
Success requires a tenacious spirit and constant effort.
Tips
history
From Su Shi's Song-dynasty 《晁错论》: '古之立大事者,不惟有超世之才,亦必有坚忍不拔之志。' Su Shi argues that accomplishing great things demands not only extraordinary talent but also unshakeable resolve.
usage
Attributive modifier for qualities: 的毅力 / 的精神 / 的意志 / 的品质. A cornerstone word for motivational, biographical, and educational writing. Often paired with 不屈不挠 (never yielding).