preach to the converted
成語所屬單字convert
preach to the converted — 慣用語
1. To try to persuade people who already agree with your opinion.
1.慣用語
釋義
對已認同者說教
To try to persuade people who already agree with your opinion.
例句
Maya told her team to save energy, but she was preaching to the converted.
Are you preaching to the converted when you explain the benefits of recycling to us?