To be is to do.

Society is well governed when its people obey the magistrates， and the magistrates obey the law.

释义：就像飞蛾扑向火焰一样，哪里会因为可能被焚烧身体而感到可惜呢。比喻表达了一种义无反顾、勇往直前的精神，即使面临危险和牺牲也在所不惜。