preach to the choir

US /priːtʃ tu ðə kwaɪər/
UK /priːtʃ tu ðə kwaɪər/
"preach to the choir" picture
1.

predicar a los conversos, llevar leña al monte

to try to persuade people to believe things that they already believe

:
When I talk about the importance of environmental protection to this group, I feel like I'm preaching to the choir.
Cuando hablo de la importancia de la protección del medio ambiente a este grupo, siento que estoy predicando a los conversos.
You don't need to convince me; you're preaching to the choir.
No necesitas convencerme; estás predicando a los conversos.