「一張一馳，文武之道也。」的英文怎樣譯?

I try my best
To know what to grip tightly and what to let go is the lesson to be learned by both a scholar and a general.
解釋:
grip tightly: 抓緊
let go: 放松
lesson to be learned: 必須學習的事情 / xx之道
scholar: 文人
general: 武將

不是最好, 但至少不是用網譯誤導人

As soon as “spreads, civil and military road.」