True sincerity or genuine intentions do not need verbal declaration; they are naturally revealed through one's actions and conduct, becoming as self-evident as the coldness of ice and the heat of charcoal.
他的勤奋和对工作的热爱，冰炭不言，冷热自明，大家都有目共睹。
His diligence and passion for work, like ice and charcoal, need no words; their effects are self-evident and observed by all.
Era:
Ancient
Frequency:
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