语本史记・卷六十五・孙子吴起传:“兵既整齐,王可试下观之,唯王所欲用之,虽赴水火犹可也。”指不避艰险。《四游记・东游记・第三十三回》:“大仙有命,水火不辞,斧钺不避。”
英语 forge ahead unflinchingly even if one has to go through fire and water(through thick and thin)