preach

To speak vehemently against; to decry.

To speak to or persuade a nearly nonexistent audience, or to an audience not listening.

To attempt to persuade a party that does not wish to listen or cannot be altered in its conviction.

To speak as if to convince a person or group of something they already believe.

To speak strongly in praise of.

To act hypocritically; to fail to practice what one preaches.