《荀子·大略》
岁月不寒冷就无从知道松柏的坚毅挺拔，事情不危难就无从知道君子的志向远大。
岁不寒无以知松柏，事不难无以知君子无日不在是。
If the years are not cold, we will not know the tenacity and fortitude of pines and cypresses; if things are not in danger, we will not know the lofty 志向 of gentlemen.