you can lead a horse to water, but you can't make it drink

Từ điển Oxford Advanced Learner 8th

you can ˌlead/ˌtake a horse to ˌwater, but you ˌcan't make it ˈdrink idiom
(saying)you can give sb the opportunity to do sth, but you cannot force them to do it if they do not want to
Main entry: ↑horse_idiom