preach in the desert
idiomTo speak to or persuade a nearly nonexistent audience, or to an audience not listening.
- 01
preach to deaf ears
To attempt to persuade a party that does not wish to listen or cannot be altered in its conviction.
- 02
preach to the choir
To speak as if to convince a person or group of something they already believe.
- 03
preach water and drink wine
To act hypocritically; to fail to practice what one preaches.