qiān​lǜ​yī​shī

to err is human

Senses

千虑一失/ 千慮一失 qiān​lǜ​yī​shī (also qiān​lǜ​yì​shī) to err is human

(idiom) even the wisest person occasionally makes a mistake after careful consideration; literally "a thousand considerations, one mistake"

References

antonym 千虑一失/千慮一失 千虑一得/千慮一得