You may be acting in the best interests of the horse by taking him to the
trough, but if he doesn’t want to drink is not going to – and that’s that.
Similarly, you can do your utmost to make a person share your views, yet there
is a point beyond which he will not go.

> ‘I’ve listened to your arguments with the closest attention, Professor, and
I have read carefully all the books you recommended, but I still can’t agree
with you.’