自强不息

“constantly strive to become stronger; make unremitting (or unceasing) efforts to improve oneself”

自强：自己努力向上；息：停止。自觉地努力向上，永不松懈。

Origin 《周易·乾》：“天行健，君子以自强不息。”

Example 一个国家要想强盛，必须要有～的精神。