三人行,必有我师焉。择其善者而从之,其不善者而改之。
When three people walk together, one of them must be my teacher. I follow what is good in them and correct in myself what is not good.
Plain meaningEveryone can teach you something—through an example to follow or a mistake to avoid.
The Analects
Original context and translation note
English wording on Gu Ren Said is an original reading aid, not a claim that there is only one valid literary translation.