明鏡も裏を照らさず（めいきょうもうらをてらさず）

Japanese vocabulary

Meaning: anyone can make a mistake; even Homer nods; even a polished mirror conceals its reverse side

See it used in real works

• Example sentences from Japanese novels & web fiction (Massif)
• Hear “明鏡も裏を照らさず” pronounced in real videos (YouGlish)