千慮一失 qiān lǜ yī shī

DEFINITIONS

  1. reflect a thousand times and you can still make a mistake (idiom); to err is human

CHARACTERS

千 qiān thousand; many, numerous; very; (Cant.) a cheater, swindler
慮 lǜ be concerned, worry about
一 yī one; a, an; alone
失 shī lose; make mistake, neglect