Even a very careful person or a wise man can make a mistake or overlook something.
尽管这位经验丰富的工程师反复检查了设计图，但最终还是出现了一个小小的失误，真是千虑一失啊。
Although the experienced engineer repeatedly checked the design blueprints, a small error still occurred in the end; it was truly a case of 'a thousand considerations, one slip'.
Era:
Ancient
Frequency:
Antonym:
Story:
During the Spring and Autumn period, Yan Ying, the prime minister of the State of Qi, was an upright and incorruptible official who lived a very simple life.
Qi Jinggong's subordinates witnessed Yan Ying's modest lifestyle and reported it to Duke Jing of Qi.
Duke Jing then sent a large sum of gold for Yan Ying to use for entertaining guests.
Yan Ying repeatedly declined the gift, saying, 'Even a sage, with a thousand considerations, will make one mistake; and even a fool, with a thousand considerations, will have one gain.'
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