As a leader, he frequently engages in self-reflection.
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history
From 《礼记·乐记》: '好恶无节于内,知诱于外,不能反躬,天理灭矣' (if one cannot turn inward and reflect, heavenly principle is lost). A core Confucian practice — 省 here is xǐng, 'to examine'.
mistakes
省 here is xǐng (3rd tone, to examine), NOT shěng (to save). Compare 反省 fǎnxǐng with the same meaning.