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

Best definition
you can lead a horse to water, but you can’t make it drink
Something that you say which means you can give someone the opportunity to do something, but you cannot force them

to do it if they do not want to.

I made all the arrangements, bought the ticket, and even took him to the airport, but he just wouldn’t get on the plane. Well, you can lead a horse to water, but you can’t make it drink.