桃李不言，下自成蹊
the peach and the plum do not speak, yet a path is worn beneath them — a man of true worth attracts admiration
e.g. 王先生忠厚少言，但桃李不言，下自成蹊，其道德、学问名垂一时，为世人所景仰。
Mr. Wnag is a man of honesty and few words, yet he has won the admiration of all and sundry for his integrity and erudition.
