旁观者清当局者迷
A bystander sees clearly, but a person involved is confused
以上为机器翻译结果，长、整句建议使用 人工翻译 。
大凡天下事，当局者迷，旁观者清。
Generally, for matters under heaven, those closely involved cannot see as clearly as those outside.
《新英汉大辞典》
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