Zhǐyǒu tuīxīn-zhìfù, cáinéng huàn lái zhēnzhèng de xìnrèn.
Only by opening one's heart fully can one earn real trust.
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From 《后汉书·光武帝本纪》: Liu Xiu, having accepted the surrender of enemy troops, rode unguarded through their camp, saying "the Xiao king places his red heart into others' bellies - how could they fail to die for me?"
