身经百战者必遍体鳞伤驰骋沙场者必心存信仰
[shēn jīng băi zhàn zhĕ bì biàn tĭ lín shāng chí chĕng shā chăng zhĕ bì xīn cún xìn yăng]
It suggests someone who is experienced and has gone through numerous battles may have suffered a lot and become battle-hardened, but they hold onto their faith to fight persistently in any field of battle or fierce competition. It conveys resilience mixed with strong beliefs.