Preach to the choir: To convince people that are already convinced; to make one’s case primarily to one’s supporters (preach 傳道,傳教, choir 唱詩班) 白費唇舌 Examples: 1) Honestly, you’re preaching to the choir, but I just don’t have enough money now to donate. 2) Don’t waste your time telling us about the problem. That’s preaching to...Continue reading